/*!
 * Bootstrap-select v1.13.12 (https://developer.snapappointments.com/bootstrap-select)
 *
 * Copyright 2012-2019 SnapAppointments, LLC
 * Licensed under MIT (https://github.com/snapappointments/bootstrap-select/blob/master/LICENSE)
 */

(function(root, factory) {
  if (root === undefined && window !== undefined) root = window;
  if (typeof define === 'function' && define.amd) {
    // AMD. Register as an anonymous module unless amdModuleId is set
    define(["jquery"], function(a0) {
      return (factory(a0));
    });
  } else if (typeof module === 'object' && module.exports) {
    // Node. Does not work with strict CommonJS, but
    // only CommonJS-like environments that support module.exports,
    // like Node.
    module.exports = factory(require("jquery"));
  } else {
    factory(root["jQuery"]);
  }
}(this, function(jQuery) {

  (function($) {
    'use strict';

    var DISALLOWED_ATTRIBUTES = ['sanitize', 'whiteList', 'sanitizeFn'];

    var uriAttrs = [
      'background',
      'cite',
      'href',
      'itemtype',
      'longdesc',
      'poster',
      'src',
      'xlink:href'
    ];

    var ARIA_ATTRIBUTE_PATTERN = /^aria-[\w-]*$/i;

    var DefaultWhitelist = {
      // Global attributes allowed on any supplied element below.
      '*': ['class', 'dir', 'id', 'lang', 'role', 'tabindex', 'style', ARIA_ATTRIBUTE_PATTERN],
      a: ['target', 'href', 'title', 'rel'],
      area: [],
      b: [],
      br: [],
      col: [],
      code: [],
      div: [],
      em: [],
      hr: [],
      h1: [],
      h2: [],
      h3: [],
      h4: [],
      h5: [],
      h6: [],
      i: [],
      img: ['src', 'alt', 'title', 'width', 'height'],
      li: [],
      ol: [],
      p: [],
      pre: [],
      s: [],
      small: [],
      span: [],
      sub: [],
      sup: [],
      strong: [],
      u: [],
      ul: []
    }

    /**
     * A pattern that recognizes a commonly useful subset of URLs that are safe.
     *
     * Shoutout to Angular 7 https://github.com/angular/angular/blob/7.2.4/packages/core/src/sanitization/url_sanitizer.ts
     */
    var SAFE_URL_PATTERN = /^(?:(?:https?|mailto|ftp|tel|file):|[^&:/?#]*(?:[/?#]|$))/gi;

    /**
     * A pattern that matches safe data URLs. Only matches image, video and audio types.
     *
     * Shoutout to Angular 7 https://github.com/angular/angular/blob/7.2.4/packages/core/src/sanitization/url_sanitizer.ts
     */
    var DATA_URL_PATTERN = /^data:(?:image\/(?:bmp|gif|jpeg|jpg|png|tiff|webp)|video\/(?:mpeg|mp4|ogg|webm)|audio\/(?:mp3|oga|ogg|opus));base64,[a-z0-9+/]+=*$/i;

    function allowedAttribute(attr, allowedAttributeList) {
      var attrName = attr.nodeName.toLowerCase()

      if ($.inArray(attrName, allowedAttributeList) !== -1) {
        if ($.inArray(attrName, uriAttrs) !== -1) {
          return Boolean(attr.nodeValue.match(SAFE_URL_PATTERN) || attr.nodeValue.match(DATA_URL_PATTERN))
        }

        return true
      }

      var regExp = $(allowedAttributeList).filter(function(index, value) {
        return value instanceof RegExp
      })

      // Check if a regular expression validates the attribute.
      for (var i = 0, l = regExp.length; i < l; i++) {
        if (attrName.match(regExp[i])) {
          return true
        }
      }

      return false
    }

    function sanitizeHtml(unsafeElements, whiteList, sanitizeFn) {
      if (sanitizeFn && typeof sanitizeFn === 'function') {
        return sanitizeFn(unsafeElements);
      }

      var whitelistKeys = Object.keys(whiteList);

      for (var i = 0, len = unsafeElements.length; i < len; i++) {
        var elements = unsafeElements[i].querySelectorAll('*');

        for (var j = 0, len2 = elements.length; j < len2; j++) {
          var el = elements[j];
          var elName = el.nodeName.toLowerCase();

          if (whitelistKeys.indexOf(elName) === -1) {
            el.parentNode.removeChild(el);

            continue;
          }

          var attributeList = [].slice.call(el.attributes);
          var whitelistedAttributes = [].concat(whiteList['*'] || [], whiteList[elName] || []);

          for (var k = 0, len3 = attributeList.length; k < len3; k++) {
            var attr = attributeList[k];

            if (!allowedAttribute(attr, whitelistedAttributes)) {
              el.removeAttribute(attr.nodeName);
            }
          }
        }
      }
    }

    // Polyfill for browsers with no classList support
    // Remove in v2
    if (!('classList' in document.createElement('_'))) {
      (function(view) {
        if (!('Element' in view)) return;

        var classListProp = 'classList',
          protoProp = 'prototype',
          elemCtrProto = view.Element[protoProp],
          objCtr = Object,
          classListGetter = function() {
            var $elem = $(this);

            return {
              add: function(classes) {
                classes = Array.prototype.slice.call(arguments).join(' ');
                return $elem.addClass(classes);
              },
              remove: function(classes) {
                classes = Array.prototype.slice.call(arguments).join(' ');
                return $elem.removeClass(classes);
              },
              toggle: function(classes, force) {
                return $elem.toggleClass(classes, force);
              },
              contains: function(classes) {
                return $elem.hasClass(classes);
              }
            }
          };

        if (objCtr.defineProperty) {
          var classListPropDesc = {
            get: classListGetter,
            enumerable: true,
            configurable: true
          };
          try {
            objCtr.defineProperty(elemCtrProto, classListProp, classListPropDesc);
          } catch (ex) { // IE 8 doesn't support enumerable:true
            // adding undefined to fight this issue https://github.com/eligrey/classList.js/issues/36
            // modernie IE8-MSW7 machine has IE8 8.0.6001.18702 and is affected
            if (ex.number === undefined || ex.number === -0x7FF5EC54) {
              classListPropDesc.enumerable = false;
              objCtr.defineProperty(elemCtrProto, classListProp, classListPropDesc);
            }
          }
        } else if (objCtr[protoProp].__defineGetter__) {
          elemCtrProto.__defineGetter__(classListProp, classListGetter);
        }
      }(window));
    }

    var testElement = document.createElement('_');

    testElement.classList.add('c1', 'c2');

    if (!testElement.classList.contains('c2')) {
      var _add = DOMTokenList.prototype.add,
        _remove = DOMTokenList.prototype.remove;

      DOMTokenList.prototype.add = function() {
        Array.prototype.forEach.call(arguments, _add.bind(this));
      }

      DOMTokenList.prototype.remove = function() {
        Array.prototype.forEach.call(arguments, _remove.bind(this));
      }
    }

    testElement.classList.toggle('c3', false);

    // Polyfill for IE 10 and Firefox <24, where classList.toggle does not
    // support the second argument.
    if (testElement.classList.contains('c3')) {
      var _toggle = DOMTokenList.prototype.toggle;

      DOMTokenList.prototype.toggle = function(token, force) {
        if (1 in arguments && !this.contains(token) === !force) {
          return force;
        } else {
          return _toggle.call(this, token);
        }
      };
    }

    testElement = null;

    // shallow array comparison
    function isEqual(array1, array2) {
      return array1.length === array2.length && array1.every(function(element, index) {
        return element === array2[index];
      });
    };

    // <editor-fold desc="Shims">
    if (!String.prototype.startsWith) {
      (function() {
        'use strict'; // needed to support `apply`/`call` with `undefined`/`null`
        var defineProperty = (function() {
          // IE 8 only supports `Object.defineProperty` on DOM elements
          try {
            var object = {};
            var $defineProperty = Object.defineProperty;
            var result = $defineProperty(object, object, object) && $defineProperty;
          } catch (error) {}
          return result;
        }());
        var toString = {}.toString;
        var startsWith = function(search) {
          if (this == null) {
            throw new TypeError();
          }
          var string = String(this);
          if (search && toString.call(search) == '[object RegExp]') {
            throw new TypeError();
          }
          var stringLength = string.length;
          var searchString = String(search);
          var searchLength = searchString.length;
          var position = arguments.length > 1 ? arguments[1] : undefined;
          // `ToInteger`
          var pos = position ? Number(position) : 0;
          if (pos != pos) { // better `isNaN`
            pos = 0;
          }
          var start = Math.min(Math.max(pos, 0), stringLength);
          // Avoid the `indexOf` call if no match is possible
          if (searchLength + start > stringLength) {
            return false;
          }
          var index = -1;
          while (++index < searchLength) {
            if (string.charCodeAt(start + index) != searchString.charCodeAt(index)) {
              return false;
            }
          }
          return true;
        };
        if (defineProperty) {
          defineProperty(String.prototype, 'startsWith', {
            'value': startsWith,
            'configurable': true,
            'writable': true
          });
        } else {
          String.prototype.startsWith = startsWith;
        }
      }());
    }

    if (!Object.keys) {
      Object.keys = function(
        o, // object
        k, // key
        r // result array
      ) {
        // initialize object and result
        r = [];
        // iterate over object keys
        for (k in o) {
          // fill result array with non-prototypical keys
          r.hasOwnProperty.call(o, k) && r.push(k);
        }
        // return result
        return r;
      };
    }

    if (HTMLSelectElement && !HTMLSelectElement.prototype.hasOwnProperty('selectedOptions')) {
      Object.defineProperty(HTMLSelectElement.prototype, 'selectedOptions', {
        get: function() {
          return this.querySelectorAll(':checked');
        }
      });
    }

    function getSelectedOptions(select, ignoreDisabled) {
      var selectedOptions = select.selectedOptions,
        options = [],
        opt;

      if (ignoreDisabled) {
        for (var i = 0, len = selectedOptions.length; i < len; i++) {
          opt = selectedOptions[i];

          if (!(opt.disabled || opt.parentNode.tagName === 'OPTGROUP' && opt.parentNode.disabled)) {
            options.push(opt);
          }
        }

        return options;
      }

      return selectedOptions;
    }

    // much faster than $.val()
    function getSelectValues(select, selectedOptions) {
      var value = [],
        options = selectedOptions || select.selectedOptions,
        opt;

      for (var i = 0, len = options.length; i < len; i++) {
        opt = options[i];

        if (!(opt.disabled || opt.parentNode.tagName === 'OPTGROUP' && opt.parentNode.disabled)) {
          value.push(opt.value || opt.text);
        }
      }

      if (!select.multiple) {
        return !value.length ? null : value[0];
      }

      return value;
    }

    // set data-selected on select element if the value has been programmatically selected
    // prior to initialization of bootstrap-select
    // * consider removing or replacing an alternative method *
    var valHooks = {
      useDefault: false,
      _set: $.valHooks.select.set
    };

    $.valHooks.select.set = function(elem, value) {
      if (value && !valHooks.useDefault) $(elem).data('selected', true);

      return valHooks._set.apply(this, arguments);
    };

    var changedArguments = null;

    var EventIsSupported = (function() {
      try {
        new Event('change');
        return true;
      } catch (e) {
        return false;
      }
    })();

    $.fn.triggerNative = function(eventName) {
      var el = this[0],
        event;

      if (el.dispatchEvent) { // for modern browsers & IE9+
        if (EventIsSupported) {
          // For modern browsers
          event = new Event(eventName, {
            bubbles: true
          });
        } else {
          // For IE since it doesn't support Event constructor
          event = document.createEvent('Event');
          event.initEvent(eventName, true, false);
        }

        el.dispatchEvent(event);
      } else if (el.fireEvent) { // for IE8
        event = document.createEventObject();
        event.eventType = eventName;
        el.fireEvent('on' + eventName, event);
      } else {
        // fall back to jQuery.trigger
        this.trigger(eventName);
      }
    };
    // </editor-fold>

    function stringSearch(li, searchString, method, normalize) {
      var stringTypes = [
          'display',
          'subtext',
          'tokens'
        ],
        searchSuccess = false;

      for (var i = 0; i < stringTypes.length; i++) {
        var stringType = stringTypes[i],
          string = li[stringType];

        if (string) {
          string = string.toString();

          // Strip HTML tags. This isn't perfect, but it's much faster than any other method
          if (stringType === 'display') {
            string = string.replace(/<[^>]+>/g, '');
          }

          if (normalize) string = normalizeToBase(string);
          string = string.toUpperCase();

          if (method === 'contains') {
            searchSuccess = string.indexOf(searchString) >= 0;
          } else {
            searchSuccess = string.startsWith(searchString);
          }

          if (searchSuccess) break;
        }
      }

      return searchSuccess;
    }

    function toInteger(value) {
      return parseInt(value, 10) || 0;
    }

    // Borrowed from Lodash (_.deburr)
    /** Used to map Latin Unicode letters to basic Latin letters. */
    var deburredLetters = {
      // Latin-1 Supplement block.
      '\xc0': 'A',
      '\xc1': 'A',
      '\xc2': 'A',
      '\xc3': 'A',
      '\xc4': 'A',
      '\xc5': 'A',
      '\xe0': 'a',
      '\xe1': 'a',
      '\xe2': 'a',
      '\xe3': 'a',
      '\xe4': 'a',
      '\xe5': 'a',
      '\xc7': 'C',
      '\xe7': 'c',
      '\xd0': 'D',
      '\xf0': 'd',
      '\xc8': 'E',
      '\xc9': 'E',
      '\xca': 'E',
      '\xcb': 'E',
      '\xe8': 'e',
      '\xe9': 'e',
      '\xea': 'e',
      '\xeb': 'e',
      '\xcc': 'I',
      '\xcd': 'I',
      '\xce': 'I',
      '\xcf': 'I',
      '\xec': 'i',
      '\xed': 'i',
      '\xee': 'i',
      '\xef': 'i',
      '\xd1': 'N',
      '\xf1': 'n',
      '\xd2': 'O',
      '\xd3': 'O',
      '\xd4': 'O',
      '\xd5': 'O',
      '\xd6': 'O',
      '\xd8': 'O',
      '\xf2': 'o',
      '\xf3': 'o',
      '\xf4': 'o',
      '\xf5': 'o',
      '\xf6': 'o',
      '\xf8': 'o',
      '\xd9': 'U',
      '\xda': 'U',
      '\xdb': 'U',
      '\xdc': 'U',
      '\xf9': 'u',
      '\xfa': 'u',
      '\xfb': 'u',
      '\xfc': 'u',
      '\xdd': 'Y',
      '\xfd': 'y',
      '\xff': 'y',
      '\xc6': 'Ae',
      '\xe6': 'ae',
      '\xde': 'Th',
      '\xfe': 'th',
      '\xdf': 'ss',
      // Latin Extended-A block.
      '\u0100': 'A',
      '\u0102': 'A',
      '\u0104': 'A',
      '\u0101': 'a',
      '\u0103': 'a',
      '\u0105': 'a',
      '\u0106': 'C',
      '\u0108': 'C',
      '\u010a': 'C',
      '\u010c': 'C',
      '\u0107': 'c',
      '\u0109': 'c',
      '\u010b': 'c',
      '\u010d': 'c',
      '\u010e': 'D',
      '\u0110': 'D',
      '\u010f': 'd',
      '\u0111': 'd',
      '\u0112': 'E',
      '\u0114': 'E',
      '\u0116': 'E',
      '\u0118': 'E',
      '\u011a': 'E',
      '\u0113': 'e',
      '\u0115': 'e',
      '\u0117': 'e',
      '\u0119': 'e',
      '\u011b': 'e',
      '\u011c': 'G',
      '\u011e': 'G',
      '\u0120': 'G',
      '\u0122': 'G',
      '\u011d': 'g',
      '\u011f': 'g',
      '\u0121': 'g',
      '\u0123': 'g',
      '\u0124': 'H',
      '\u0126': 'H',
      '\u0125': 'h',
      '\u0127': 'h',
      '\u0128': 'I',
      '\u012a': 'I',
      '\u012c': 'I',
      '\u012e': 'I',
      '\u0130': 'I',
      '\u0129': 'i',
      '\u012b': 'i',
      '\u012d': 'i',
      '\u012f': 'i',
      '\u0131': 'i',
      '\u0134': 'J',
      '\u0135': 'j',
      '\u0136': 'K',
      '\u0137': 'k',
      '\u0138': 'k',
      '\u0139': 'L',
      '\u013b': 'L',
      '\u013d': 'L',
      '\u013f': 'L',
      '\u0141': 'L',
      '\u013a': 'l',
      '\u013c': 'l',
      '\u013e': 'l',
      '\u0140': 'l',
      '\u0142': 'l',
      '\u0143': 'N',
      '\u0145': 'N',
      '\u0147': 'N',
      '\u014a': 'N',
      '\u0144': 'n',
      '\u0146': 'n',
      '\u0148': 'n',
      '\u014b': 'n',
      '\u014c': 'O',
      '\u014e': 'O',
      '\u0150': 'O',
      '\u014d': 'o',
      '\u014f': 'o',
      '\u0151': 'o',
      '\u0154': 'R',
      '\u0156': 'R',
      '\u0158': 'R',
      '\u0155': 'r',
      '\u0157': 'r',
      '\u0159': 'r',
      '\u015a': 'S',
      '\u015c': 'S',
      '\u015e': 'S',
      '\u0160': 'S',
      '\u015b': 's',
      '\u015d': 's',
      '\u015f': 's',
      '\u0161': 's',
      '\u0162': 'T',
      '\u0164': 'T',
      '\u0166': 'T',
      '\u0163': 't',
      '\u0165': 't',
      '\u0167': 't',
      '\u0168': 'U',
      '\u016a': 'U',
      '\u016c': 'U',
      '\u016e': 'U',
      '\u0170': 'U',
      '\u0172': 'U',
      '\u0169': 'u',
      '\u016b': 'u',
      '\u016d': 'u',
      '\u016f': 'u',
      '\u0171': 'u',
      '\u0173': 'u',
      '\u0174': 'W',
      '\u0175': 'w',
      '\u0176': 'Y',
      '\u0177': 'y',
      '\u0178': 'Y',
      '\u0179': 'Z',
      '\u017b': 'Z',
      '\u017d': 'Z',
      '\u017a': 'z',
      '\u017c': 'z',
      '\u017e': 'z',
      '\u0132': 'IJ',
      '\u0133': 'ij',
      '\u0152': 'Oe',
      '\u0153': 'oe',
      '\u0149': "'n",
      '\u017f': 's'
    };

    /** Used to match Latin Unicode letters (excluding mathematical operators). */
    var reLatin = /[\xc0-\xd6\xd8-\xf6\xf8-\xff\u0100-\u017f]/g;

    /** Used to compose unicode character classes. */
    var rsComboMarksRange = '\\u0300-\\u036f',
      reComboHalfMarksRange = '\\ufe20-\\ufe2f',
      rsComboSymbolsRange = '\\u20d0-\\u20ff',
      rsComboMarksExtendedRange = '\\u1ab0-\\u1aff',
      rsComboMarksSupplementRange = '\\u1dc0-\\u1dff',
      rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange + rsComboMarksExtendedRange + rsComboMarksSupplementRange;

    /** Used to compose unicode capture groups. */
    var rsCombo = '[' + rsComboRange + ']';

    /**
     * Used to match [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks) and
     * [combining diacritical marks for symbols](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks_for_Symbols).
     */
    var reComboMark = RegExp(rsCombo, 'g');

    function deburrLetter(key) {
      return deburredLetters[key];
    };

    function normalizeToBase(string) {
      string = string.toString();
      return string && string.replace(reLatin, deburrLetter).replace(reComboMark, '');
    }

    // List of HTML entities for escaping.
    var escapeMap = {
      '&': '&amp;',
      '<': '&lt;',
      '>': '&gt;',
      '"': '&quot;',
      "'": '&#x27;',
      '`': '&#x60;'
    };

    // Functions for escaping and unescaping strings to/from HTML interpolation.
    var createEscaper = function(map) {
      var escaper = function(match) {
        return map[match];
      };
      // Regexes for identifying a key that needs to be escaped.
      var source = '(?:' + Object.keys(map).join('|') + ')';
      var testRegexp = RegExp(source);
      var replaceRegexp = RegExp(source, 'g');
      return function(string) {
        string = string == null ? '' : '' + string;
        return testRegexp.test(string) ? string.replace(replaceRegexp, escaper) : string;
      };
    };

    var htmlEscape = createEscaper(escapeMap);

    /**
     * ------------------------------------------------------------------------
     * Constants
     * ------------------------------------------------------------------------
     */

    var keyCodeMap = {
      32: ' ',
      48: '0',
      49: '1',
      50: '2',
      51: '3',
      52: '4',
      53: '5',
      54: '6',
      55: '7',
      56: '8',
      57: '9',
      59: ';',
      65: 'A',
      66: 'B',
      67: 'C',
      68: 'D',
      69: 'E',
      70: 'F',
      71: 'G',
      72: 'H',
      73: 'I',
      74: 'J',
      75: 'K',
      76: 'L',
      77: 'M',
      78: 'N',
      79: 'O',
      80: 'P',
      81: 'Q',
      82: 'R',
      83: 'S',
      84: 'T',
      85: 'U',
      86: 'V',
      87: 'W',
      88: 'X',
      89: 'Y',
      90: 'Z',
      96: '0',
      97: '1',
      98: '2',
      99: '3',
      100: '4',
      101: '5',
      102: '6',
      103: '7',
      104: '8',
      105: '9'
    };

    var keyCodes = {
      ESCAPE: 27, // KeyboardEvent.which value for Escape (Esc) key
      ENTER: 13, // KeyboardEvent.which value for Enter key
      SPACE: 32, // KeyboardEvent.which value for space key
      TAB: 9, // KeyboardEvent.which value for tab key
      ARROW_UP: 38, // KeyboardEvent.which value for up arrow key
      ARROW_DOWN: 40 // KeyboardEvent.which value for down arrow key
    }

    var version = {
      success: false,
      major: '3'
    };

    try {
      version.full = ($.fn.dropdown.Constructor.VERSION || '').split(' ')[0].split('.');
      version.major = version.full[0];
      version.success = true;
    } catch (err) {
      // do nothing
    }

    var selectId = 0;

    var EVENT_KEY = '.bs.select';

    var classNames = {
      DISABLED: 'disabled',
      DIVIDER: 'divider',
      SHOW: 'open',
      DROPUP: 'dropup',
      MENU: 'dropdown-menu',
      MENURIGHT: 'dropdown-menu-right',
      MENULEFT: 'dropdown-menu-left',
      // to-do: replace with more advanced template/customization options
      BUTTONCLASS: 'btn-default',
      POPOVERHEADER: 'popover-title',
      ICONBASE: 'material-icons',
      TICKICON: 'glyphicon-ok'
    }

    var Selector = {
      MENU: '.' + classNames.MENU
    }

    var elementTemplates = {
      span: document.createElement('span'),
      i: document.createElement('i'),
      subtext: document.createElement('small'),
      a: document.createElement('a'),
      li: document.createElement('li'),
      whitespace: document.createTextNode('\u00A0'),
      fragment: document.createDocumentFragment()
    }

    elementTemplates.a.setAttribute('role', 'option');
    elementTemplates.subtext.className = 'text-muted';

    elementTemplates.text = elementTemplates.span.cloneNode(false);
    elementTemplates.text.className = 'text';

    elementTemplates.checkMark = elementTemplates.span.cloneNode(false);

    var REGEXP_ARROW = new RegExp(keyCodes.ARROW_UP + '|' + keyCodes.ARROW_DOWN);
    var REGEXP_TAB_OR_ESCAPE = new RegExp('^' + keyCodes.TAB + '$|' + keyCodes.ESCAPE);

    var generateOption = {
      li: function(content, classes, optgroup) {
        var li = elementTemplates.li.cloneNode(false);

        if (content) {
          if (content.nodeType === 1 || content.nodeType === 11) {
            li.appendChild(content);
          } else {
            li.innerHTML = content;
          }
        }

        if (typeof classes !== 'undefined' && classes !== '') li.className = classes;
        if (typeof optgroup !== 'undefined' && optgroup !== null) li.classList.add('optgroup-' + optgroup);

        return li;
      },

      a: function(text, classes, inline) {
        var a = elementTemplates.a.cloneNode(true);

        if (text) {
          if (text.nodeType === 11) {
            a.appendChild(text);
          } else {
            a.insertAdjacentHTML('beforeend', text);
          }
        }

        if (typeof classes !== 'undefined' && classes !== '') a.className = classes;
        if (version.major === '4') a.classList.add('dropdown-item');
        if (inline) a.setAttribute('style', inline);

        return a;
      },

      text: function(options, useFragment) {
        var textElement = elementTemplates.text.cloneNode(false),
          subtextElement,
          iconElement;

        if (options.content) {
          textElement.innerHTML = options.content;
        } else {
          textElement.textContent = options.text;

          if (options.icon) {
            var whitespace = elementTemplates.whitespace.cloneNode(false);

            // need to use <i> for icons in the button to prevent a breaking change
            // note: switch to span in next major release
            iconElement = (useFragment === true ? elementTemplates.i : elementTemplates.span).cloneNode(false);
            iconElement.className = options.iconBase + ' ' + options.icon;

            elementTemplates.fragment.appendChild(iconElement);
            elementTemplates.fragment.appendChild(whitespace);
          }

          if (options.subtext) {
            subtextElement = elementTemplates.subtext.cloneNode(false);
            subtextElement.textContent = options.subtext;
            textElement.appendChild(subtextElement);
          }
        }

        if (useFragment === true) {
          while (textElement.childNodes.length > 0) {
            elementTemplates.fragment.appendChild(textElement.childNodes[0]);
          }
        } else {
          elementTemplates.fragment.appendChild(textElement);
        }

        return elementTemplates.fragment;
      },

      label: function(options) {
        var textElement = elementTemplates.text.cloneNode(false),
          subtextElement,
          iconElement;

        textElement.innerHTML = options.label;

        if (options.icon) {
          var whitespace = elementTemplates.whitespace.cloneNode(false);

          iconElement = elementTemplates.span.cloneNode(false);
          iconElement.className = options.iconBase + ' ' + options.icon;

          elementTemplates.fragment.appendChild(iconElement);
          elementTemplates.fragment.appendChild(whitespace);
        }

        if (options.subtext) {
          subtextElement = elementTemplates.subtext.cloneNode(false);
          subtextElement.textContent = options.subtext;
          textElement.appendChild(subtextElement);
        }

        elementTemplates.fragment.appendChild(textElement);

        return elementTemplates.fragment;
      }
    }

    var Selectpicker = function(element, options) {
      var that = this;

      // bootstrap-select has been initialized - revert valHooks.select.set back to its original function
      if (!valHooks.useDefault) {
        $.valHooks.select.set = valHooks._set;
        valHooks.useDefault = true;
      }

      this.$element = $(element);
      this.$newElement = null;
      this.$button = null;
      this.$menu = null;
      this.options = options;
      this.selectpicker = {
        main: {},
        search: {},
        current: {}, // current changes if a search is in progress
        view: {},
        keydown: {
          keyHistory: '',
          resetKeyHistory: {
            start: function() {
              return setTimeout(function() {
                that.selectpicker.keydown.keyHistory = '';
              }, 800);
            }
          }
        }
      };
      // If we have no title yet, try to pull it from the html title attribute (jQuery doesnt' pick it up as it's not a
      // data-attribute)
      if (this.options.title === null) {
        this.options.title = this.$element.attr('title');
      }

      // Format window padding
      var winPad = this.options.windowPadding;
      if (typeof winPad === 'number') {
        this.options.windowPadding = [winPad, winPad, winPad, winPad];
      }

      // Expose public methods
      this.val = Selectpicker.prototype.val;
      this.render = Selectpicker.prototype.render;
      this.refresh = Selectpicker.prototype.refresh;
      this.setStyle = Selectpicker.prototype.setStyle;
      this.selectAll = Selectpicker.prototype.selectAll;
      this.deselectAll = Selectpicker.prototype.deselectAll;
      this.destroy = Selectpicker.prototype.destroy;
      this.remove = Selectpicker.prototype.remove;
      this.show = Selectpicker.prototype.show;
      this.hide = Selectpicker.prototype.hide;

      this.init();
    };

    Selectpicker.VERSION = '1.13.12';

    // part of this is duplicated in i18n/defaults-en_US.js. Make sure to update both.
    Selectpicker.DEFAULTS = {
      noneSelectedText: 'Nothing selected',
      noneResultsText: 'No results matched {0}',
      countSelectedText: function(numSelected, numTotal) {
        return (numSelected == 1) ? '{0} item selected' : '{0} items selected';
      },
      maxOptionsText: function(numAll, numGroup) {
        return [
          (numAll == 1) ? 'Limit reached ({n} item max)' : 'Limit reached ({n} items max)',
          (numGroup == 1) ? 'Group limit reached ({n} item max)' : 'Group limit reached ({n} items max)'
        ];
      },
      selectAllText: 'Select All',
      deselectAllText: 'Deselect All',
      doneButton: false,
      doneButtonText: 'Close',
      multipleSeparator: ', ',
      styleBase: 'btn',
      style: classNames.BUTTONCLASS,
      size: 'auto',
      title: null,
      selectedTextFormat: 'values',
      width: false,
      container: false,
      hideDisabled: false,
      showSubtext: false,
      showIcon: true,
      showContent: true,
      dropupAuto: true,
      header: false,
      liveSearch: false,
      liveSearchPlaceholder: null,
      liveSearchNormalize: false,
      liveSearchStyle: 'contains',
      actionsBox: false,
      iconBase: classNames.ICONBASE,
      tickIcon: classNames.TICKICON,
      showTick: false,
      template: {
        caret: '<span class="caret"></span>'
      },
      maxOptions: false,
      mobile: false,
      selectOnTab: false,
      dropdownAlignRight: false,
      windowPadding: 0,
      virtualScroll: 600,
      display: false,
      sanitize: true,
      sanitizeFn: null,
      whiteList: DefaultWhitelist
    };

    Selectpicker.prototype = {

      constructor: Selectpicker,

      init: function() {
        var that = this,
          id = this.$element.attr('id');

        selectId++;
        this.selectId = 'bs-select-' + selectId;

        this.$element[0].classList.add('bs-select-hidden');

        this.multiple = this.$element.prop('multiple');
        this.autofocus = this.$element.prop('autofocus');

        if (this.$element[0].classList.contains('show-tick')) {
          this.options.showTick = true;
        }

        this.$newElement = this.createDropdown();
        this.$element
          .after(this.$newElement)
          .prependTo(this.$newElement);

        this.$button = this.$newElement.children('button');
        this.$menu = this.$newElement.children(Selector.MENU);
        this.$menuInner = this.$menu.children('.inner');
        this.$searchbox = this.$menu.find('input');

        this.$element[0].classList.remove('bs-select-hidden');

        if (this.options.dropdownAlignRight === true) this.$menu[0].classList.add(classNames.MENURIGHT);

        if (typeof id !== 'undefined') {
          this.$button.attr('data-id', id);
        }

        this.checkDisabled();
        this.clickListener();

        if (this.options.liveSearch) {
          this.liveSearchListener();
          this.focusedParent = this.$searchbox[0];
        } else {
          this.focusedParent = this.$menuInner[0];
        }

        this.setStyle();
        this.render();
        this.setWidth();
        if (this.options.container) {
          this.selectPosition();
        } else {
          this.$element.on('hide' + EVENT_KEY, function() {
            if (that.isVirtual()) {
              // empty menu on close
              var menuInner = that.$menuInner[0],
                emptyMenu = menuInner.firstChild.cloneNode(false);

              // replace the existing UL with an empty one - this is faster than $.empty() or innerHTML = ''
              menuInner.replaceChild(emptyMenu, menuInner.firstChild);
              menuInner.scrollTop = 0;
            }
          });
        }
        this.$menu.data('this', this);
        this.$newElement.data('this', this);
        if (this.options.mobile) this.mobile();

        this.$newElement.on({
          'hide.bs.dropdown': function(e) {
            that.$element.trigger('hide' + EVENT_KEY, e);
          },
          'hidden.bs.dropdown': function(e) {
            that.$element.trigger('hidden' + EVENT_KEY, e);
          },
          'show.bs.dropdown': function(e) {
            that.$element.trigger('show' + EVENT_KEY, e);
          },
          'shown.bs.dropdown': function(e) {
            that.$element.trigger('shown' + EVENT_KEY, e);
          }
        });

        if (that.$element[0].hasAttribute('required')) {
          this.$element.on('invalid' + EVENT_KEY, function() {
            that.$button[0].classList.add('bs-invalid');

            that.$element
              .on('shown' + EVENT_KEY + '.invalid', function() {
                that.$element
                  .val(that.$element.val()) // set the value to hide the validation message in Chrome when menu is opened
                  .off('shown' + EVENT_KEY + '.invalid');
              })
              .on('rendered' + EVENT_KEY, function() {
                // if select is no longer invalid, remove the bs-invalid class
                if (this.validity.valid) that.$button[0].classList.remove('bs-invalid');
                that.$element.off('rendered' + EVENT_KEY);
              });

            that.$button.on('blur' + EVENT_KEY, function() {
              that.$element.trigger('focus').trigger('blur');
              that.$button.off('blur' + EVENT_KEY);
            });
          });
        }

        setTimeout(function() {
          that.createLi();
          that.$element.trigger('loaded' + EVENT_KEY);
        });
      },

      createDropdown: function() {
        // Options
        // If we are multiple or showTick option is set, then add the show-tick class
        var showTick = (this.multiple || this.options.showTick) ? ' show-tick' : '',
          multiselectable = this.multiple ? ' aria-multiselectable="true"' : '',
          inputGroup = '',
          autofocus = this.autofocus ? ' autofocus' : '';

        if (version.major < 4 && this.$element.parent().hasClass('input-group')) {
          inputGroup = ' input-group-btn';
        }

        // Elements
        var drop,
          header = '',
          searchbox = '',
          actionsbox = '',
          donebutton = '';

        if (this.options.header) {
          header =
            '<div class="' + classNames.POPOVERHEADER + '">' +
            '<button type="button" class="close" aria-hidden="true">&times;</button>' +
            this.options.header +
            '</div>';
        }

        if (this.options.liveSearch) {
          searchbox =
            '<div class="bs-searchbox">' +
            '<input type="search" class="form-control" autocomplete="off"' +
            (
              this.options.liveSearchPlaceholder === null ? '' :
              ' placeholder="' + htmlEscape(this.options.liveSearchPlaceholder) + '"'
            ) +
            ' role="combobox" aria-label="Search" aria-controls="' + this.selectId + '" aria-autocomplete="list">' +
            '</div>';
        }

        if (this.multiple && this.options.actionsBox) {
          actionsbox =
            '<div class="bs-actionsbox">' +
            '<div class="btn-group btn-group-sm btn-block">' +
            '<button type="button" class="actions-btn bs-select-all btn ' + classNames.BUTTONCLASS + '">' +
            this.options.selectAllText +
            '</button>' +
            '<button type="button" class="actions-btn bs-deselect-all btn ' + classNames.BUTTONCLASS + '">' +
            this.options.deselectAllText +
            '</button>' +
            '</div>' +
            '</div>';
        }

        if (this.multiple && this.options.doneButton) {
          donebutton =
            '<div class="bs-donebutton">' +
            '<div class="btn-group btn-block">' +
            '<button type="button" class="btn btn-sm ' + classNames.BUTTONCLASS + '">' +
            this.options.doneButtonText +
            '</button>' +
            '</div>' +
            '</div>';
        }

        drop =
          '<div class="dropdown bootstrap-select' + showTick + inputGroup + '">' +
          '<button type="button" class="' + this.options.styleBase + ' dropdown-toggle" ' + (this.options.display === 'static' ? 'data-display="static"' : '') + 'data-toggle="dropdown"' + autofocus + ' role="combobox" aria-owns="' + this.selectId + '" aria-haspopup="listbox" aria-expanded="false">' +
          '<div class="filter-option">' +
          '<div class="filter-option-inner">' +
          '<div class="filter-option-inner-inner"></div>' +
          '</div> ' +
          '</div>' +
          (
            version.major === '4' ? '' :
            '<span class="bs-caret">' +
            this.options.template.caret +
            '</span>'
          ) +
          '</button>' +
          '<div class="' + classNames.MENU + ' ' + (version.major === '4' ? '' : classNames.SHOW) + '">' +
          header +
          searchbox +
          actionsbox +
          '<div class="inner ' + classNames.SHOW + '" role="listbox" id="' + this.selectId + '" tabindex="-1" ' + multiselectable + '>' +
          '<ul class="' + classNames.MENU + ' inner ' + (version.major === '4' ? classNames.SHOW : '') + '" role="presentation">' +
          '</ul>' +
          '</div>' +
          donebutton +
          '</div>' +
          '</div>';

        return $(drop);
      },

      setPositionData: function() {
        this.selectpicker.view.canHighlight = [];
        this.selectpicker.view.size = 0;

        for (var i = 0; i < this.selectpicker.current.data.length; i++) {
          var li = this.selectpicker.current.data[i],
            canHighlight = true;

          if (li.type === 'divider') {
            canHighlight = false;
            li.height = this.sizeInfo.dividerHeight;
          } else if (li.type === 'optgroup-label') {
            canHighlight = false;
            li.height = this.sizeInfo.dropdownHeaderHeight;
          } else {
            li.height = this.sizeInfo.liHeight;
          }

          if (li.disabled) canHighlight = false;

          this.selectpicker.view.canHighlight.push(canHighlight);

          if (canHighlight) {
            this.selectpicker.view.size++;
            li.posinset = this.selectpicker.view.size;
          }

          li.position = (i === 0 ? 0 : this.selectpicker.current.data[i - 1].position) + li.height;
        }
      },

      isVirtual: function() {
        return (this.options.virtualScroll !== false) && (this.selectpicker.main.elements.length >= this.options.virtualScroll) || this.options.virtualScroll === true;
      },

      createView: function(isSearching, setSize, refresh) {
        var that = this,
          scrollTop = 0,
          active = [],
          selected,
          prevActive;

        this.selectpicker.current = isSearching ? this.selectpicker.search : this.selectpicker.main;

        this.setPositionData();

        if (setSize) {
          if (refresh) {
            scrollTop = this.$menuInner[0].scrollTop;
          } else if (!that.multiple) {
            var element = that.$element[0],
              selectedIndex = (element.options[element.selectedIndex] || {}).liIndex;

            if (typeof selectedIndex === 'number' && that.options.size !== false) {
              var selectedData = that.selectpicker.main.data[selectedIndex],
                position = selectedData && selectedData.position;

              if (position) {
                scrollTop = position - ((that.sizeInfo.menuInnerHeight + that.sizeInfo.liHeight) / 2);
              }
            }
          }
        }

        scroll(scrollTop, true);

        this.$menuInner.off('scroll.createView').on('scroll.createView', function(e, updateValue) {
          if (!that.noScroll) scroll(this.scrollTop, updateValue);
          that.noScroll = false;
        });

        function scroll(scrollTop, init) {
          var size = that.selectpicker.current.elements.length,
            chunks = [],
            chunkSize,
            chunkCount,
            firstChunk,
            lastChunk,
            currentChunk,
            prevPositions,
            positionIsDifferent,
            previousElements,
            menuIsDifferent = true,
            isVirtual = that.isVirtual();

          that.selectpicker.view.scrollTop = scrollTop;

          chunkSize = Math.ceil(that.sizeInfo.menuInnerHeight / that.sizeInfo.liHeight * 1.5); // number of options in a chunk
          chunkCount = Math.round(size / chunkSize) || 1; // number of chunks

          for (var i = 0; i < chunkCount; i++) {
            var endOfChunk = (i + 1) * chunkSize;

            if (i === chunkCount - 1) {
              endOfChunk = size;
            }

            chunks[i] = [
              (i) * chunkSize + (!i ? 0 : 1),
              endOfChunk
            ];

            if (!size) break;

            if (currentChunk === undefined && scrollTop - 1 <= that.selectpicker.current.data[endOfChunk - 1].position - that.sizeInfo.menuInnerHeight) {
              currentChunk = i;
            }
          }

          if (currentChunk === undefined) currentChunk = 0;

          prevPositions = [that.selectpicker.view.position0, that.selectpicker.view.position1];

          // always display previous, current, and next chunks
          firstChunk = Math.max(0, currentChunk - 1);
          lastChunk = Math.min(chunkCount - 1, currentChunk + 1);

          that.selectpicker.view.position0 = isVirtual === false ? 0 : (Math.max(0, chunks[firstChunk][0]) || 0);
          that.selectpicker.view.position1 = isVirtual === false ? size : (Math.min(size, chunks[lastChunk][1]) || 0);

          positionIsDifferent = prevPositions[0] !== that.selectpicker.view.position0 || prevPositions[1] !== that.selectpicker.view.position1;

          if (that.activeIndex !== undefined) {
            prevActive = that.selectpicker.main.elements[that.prevActiveIndex];
            active = that.selectpicker.main.elements[that.activeIndex];
            selected = that.selectpicker.main.elements[that.selectedIndex];

            if (init) {
              if (that.activeIndex !== that.selectedIndex) {
                that.defocusItem(active);
              }
              that.activeIndex = undefined;
            }

            if (that.activeIndex && that.activeIndex !== that.selectedIndex) {
              that.defocusItem(selected);
            }
          }

          if (that.prevActiveIndex !== undefined && that.prevActiveIndex !== that.activeIndex && that.prevActiveIndex !== that.selectedIndex) {
            that.defocusItem(prevActive);
          }

          if (init || positionIsDifferent) {
            previousElements = that.selectpicker.view.visibleElements ? that.selectpicker.view.visibleElements.slice() : [];

            if (isVirtual === false) {
              that.selectpicker.view.visibleElements = that.selectpicker.current.elements;
            } else {
              that.selectpicker.view.visibleElements = that.selectpicker.current.elements.slice(that.selectpicker.view.position0, that.selectpicker.view.position1);
            }

            that.setOptionStatus();

            // if searching, check to make sure the list has actually been updated before updating DOM
            // this prevents unnecessary repaints
            if (isSearching || (isVirtual === false && init)) menuIsDifferent = !isEqual(previousElements, that.selectpicker.view.visibleElements);

            // if virtual scroll is disabled and not searching,
            // menu should never need to be updated more than once
            if ((init || isVirtual === true) && menuIsDifferent) {
              var menuInner = that.$menuInner[0],
                menuFragment = document.createDocumentFragment(),
                emptyMenu = menuInner.firstChild.cloneNode(false),
                marginTop,
                marginBottom,
                elements = that.selectpicker.view.visibleElements,
                toSanitize = [];

              // replace the existing UL with an empty one - this is faster than $.empty()
              menuInner.replaceChild(emptyMenu, menuInner.firstChild);

              for (var i = 0, visibleElementsLen = elements.length; i < visibleElementsLen; i++) {
                var element = elements[i],
                  elText,
                  elementData;

                if (that.options.sanitize) {
                  elText = element.lastChild;

                  if (elText) {
                    elementData = that.selectpicker.current.data[i + that.selectpicker.view.position0];

                    if (elementData && elementData.content && !elementData.sanitized) {
                      toSanitize.push(elText);
                      elementData.sanitized = true;
                    }
                  }
                }

                menuFragment.appendChild(element);
              }

              if (that.options.sanitize && toSanitize.length) {
                sanitizeHtml(toSanitize, that.options.whiteList, that.options.sanitizeFn);
              }

              if (isVirtual === true) {
                marginTop = (that.selectpicker.view.position0 === 0 ? 0 : that.selectpicker.current.data[that.selectpicker.view.position0 - 1].position);
                marginBottom = (that.selectpicker.view.position1 > size - 1 ? 0 : that.selectpicker.current.data[size - 1].position - that.selectpicker.current.data[that.selectpicker.view.position1 - 1].position);

                menuInner.firstChild.style.marginTop = marginTop + 'px';
                menuInner.firstChild.style.marginBottom = marginBottom + 'px';
              } else {
                menuInner.firstChild.style.marginTop = 0;
                menuInner.firstChild.style.marginBottom = 0;
              }

              menuInner.firstChild.appendChild(menuFragment);

              // if an option is encountered that is wider than the current menu width, update the menu width accordingly
              // switch to ResizeObserver with increased browser support
              if (isVirtual === true && that.sizeInfo.hasScrollBar) {
                var menuInnerInnerWidth = menuInner.firstChild.offsetWidth;

                if (init && menuInnerInnerWidth < that.sizeInfo.menuInnerInnerWidth && that.sizeInfo.totalMenuWidth > that.sizeInfo.selectWidth) {
                  menuInner.firstChild.style.minWidth = that.sizeInfo.menuInnerInnerWidth + 'px';
                } else if (menuInnerInnerWidth > that.sizeInfo.menuInnerInnerWidth) {
                  // set to 0 to get actual width of menu
                  that.$menu[0].style.minWidth = 0;

                  var actualMenuWidth = menuInner.firstChild.offsetWidth;

                  if (actualMenuWidth > that.sizeInfo.menuInnerInnerWidth) {
                    that.sizeInfo.menuInnerInnerWidth = actualMenuWidth;
                    menuInner.firstChild.style.minWidth = that.sizeInfo.menuInnerInnerWidth + 'px';
                  }

                  // reset to default CSS styling
                  that.$menu[0].style.minWidth = '';
                }
              }
            }
          }

          that.prevActiveIndex = that.activeIndex;

          if (!that.options.liveSearch) {
            that.$menuInner.trigger('focus');
          } else if (isSearching && init) {
            var index = 0,
              newActive;

            if (!that.selectpicker.view.canHighlight[index]) {
              index = 1 + that.selectpicker.view.canHighlight.slice(1).indexOf(true);
            }

            newActive = that.selectpicker.view.visibleElements[index];

            that.defocusItem(that.selectpicker.view.currentActive);

            that.activeIndex = (that.selectpicker.current.data[index] || {}).index;

            that.focusItem(newActive);
          }
        }

        $(window)
          .off('resize' + EVENT_KEY + '.' + this.selectId + '.createView')
          .on('resize' + EVENT_KEY + '.' + this.selectId + '.createView', function() {
            var isActive = that.$newElement.hasClass(classNames.SHOW);

            if (isActive) scroll(that.$menuInner[0].scrollTop);
          });
      },

      focusItem: function(li, liData, noStyle) {
        if (li) {
          liData = liData || this.selectpicker.main.data[this.activeIndex];
          var a = li.firstChild;

          if (a) {
            a.setAttribute('aria-setsize', this.selectpicker.view.size);
            a.setAttribute('aria-posinset', liData.posinset);

            if (noStyle !== true) {
              this.focusedParent.setAttribute('aria-activedescendant', a.id);
              li.classList.add('active');
              a.classList.add('active');
            }
          }
        }
      },

      defocusItem: function(li) {
        if (li) {
          li.classList.remove('active');
          if (li.firstChild) li.firstChild.classList.remove('active');
        }
      },

      setPlaceholder: function() {
        var updateIndex = false;

        if (this.options.title && !this.multiple) {
          if (!this.selectpicker.view.titleOption) this.selectpicker.view.titleOption = document.createElement('option');

          // this option doesn't create a new <li> element, but does add a new option at the start,
          // so startIndex should increase to prevent having to check every option for the bs-title-option class
          updateIndex = true;

          var element = this.$element[0],
            isSelected = false,
            titleNotAppended = !this.selectpicker.view.titleOption.parentNode;

          if (titleNotAppended) {
            // Use native JS to prepend option (faster)
            this.selectpicker.view.titleOption.className = 'bs-title-option';
            this.selectpicker.view.titleOption.value = '';

            // Check if selected or data-selected attribute is already set on an option. If not, select the titleOption option.
            // the selected item may have been changed by user or programmatically before the bootstrap select plugin runs,
            // if so, the select will have the data-selected attribute
            var $opt = $(element.options[element.selectedIndex]);
            isSelected = $opt.attr('selected') === undefined && this.$element.data('selected') === undefined;
          }

          if (titleNotAppended || this.selectpicker.view.titleOption.index !== 0) {
            element.insertBefore(this.selectpicker.view.titleOption, element.firstChild);
          }

          // Set selected *after* appending to select,
          // otherwise the option doesn't get selected in IE
          // set using selectedIndex, as setting the selected attr to true here doesn't work in IE11
          if (isSelected) element.selectedIndex = 0;
        }

        return updateIndex;
      },

      createLi: function() {
        var that = this,
          iconBase = this.options.iconBase,
          optionSelector = ':not([hidden]):not([data-hidden="true"])',
          mainElements = [],
          mainData = [],
          widestOptionLength = 0,
          optID = 0,
          startIndex = this.setPlaceholder() ? 1 : 0; // append the titleOption if necessary and skip the first option in the loop

        if (this.options.hideDisabled) optionSelector += ':not(:disabled)';

        if ((that.options.showTick || that.multiple) && !elementTemplates.checkMark.parentNode) {
          elementTemplates.checkMark.className = iconBase + ' ' + that.options.tickIcon + ' check-mark';
          elementTemplates.checkMark.innerHTML = "done";
          elementTemplates.a.appendChild(elementTemplates.checkMark);
        }

        var selectOptions = this.$element[0].querySelectorAll('select > *' + optionSelector);

        function addDivider(config) {
          var previousData = mainData[mainData.length - 1];

          // ensure optgroup doesn't create back-to-back dividers
          if (
            previousData &&
            previousData.type === 'divider' &&
            (previousData.optID || config.optID)
          ) {
            return;
          }

          config = config || {};
          config.type = 'divider';

          mainElements.push(
            generateOption.li(
              false,
              classNames.DIVIDER,
              (config.optID ? config.optID + 'div' : undefined)
            )
          );

          mainData.push(config);
        }

        function addOption(option, config) {
          config = config || {};

          config.divider = option.getAttribute('data-divider') === 'true';

          if (config.divider) {
            addDivider({
              optID: config.optID
            });
          } else {
            var liIndex = mainData.length,
              cssText = option.style.cssText,
              inlineStyle = cssText ? htmlEscape(cssText) : '',
              optionClass = (option.className || '') + (config.optgroupClass || '');

            if (config.optID) optionClass = 'opt ' + optionClass;

            config.text = option.textContent;

            config.content = option.getAttribute('data-content');
            config.tokens = option.getAttribute('data-tokens');
            config.subtext = option.getAttribute('data-subtext');
            config.icon = option.getAttribute('data-icon');
            config.iconBase = iconBase;

            var textElement = generateOption.text(config);
            var liElement = generateOption.li(
              generateOption.a(
                textElement,
                optionClass,
                inlineStyle
              ),
              '',
              config.optID
            );

            if (liElement.firstChild) {
              liElement.firstChild.id = that.selectId + '-' + liIndex;
            }

            mainElements.push(liElement);

            option.liIndex = liIndex;

            config.display = config.content || config.text;
            config.type = 'option';
            config.index = liIndex;
            config.option = option;
            config.disabled = config.disabled || option.disabled;

            mainData.push(config);

            var combinedLength = 0;

            // count the number of characters in the option - not perfect, but should work in most cases
            if (config.display) combinedLength += config.display.length;
            if (config.subtext) combinedLength += config.subtext.length;
            // if there is an icon, ensure this option's width is checked
            if (config.icon) combinedLength += 1;

            if (combinedLength > widestOptionLength) {
              widestOptionLength = combinedLength;

              // guess which option is the widest
              // use this when calculating menu width
              // not perfect, but it's fast, and the width will be updating accordingly when scrolling
              that.selectpicker.view.widestOption = mainElements[mainElements.length - 1];
            }
          }
        }

        function addOptgroup(index, selectOptions) {
          var optgroup = selectOptions[index],
            previous = selectOptions[index - 1],
            next = selectOptions[index + 1],
            options = optgroup.querySelectorAll('option' + optionSelector);

          if (!options.length) return;

          var config = {
              label: htmlEscape(optgroup.label),
              subtext: optgroup.getAttribute('data-subtext'),
              icon: optgroup.getAttribute('data-icon'),
              iconBase: iconBase
            },
            optgroupClass = ' ' + (optgroup.className || ''),
            headerIndex,
            lastIndex;

          optID++;

          if (previous) {
            addDivider({
              optID: optID
            });
          }

          var labelElement = generateOption.label(config);

          mainElements.push(
            generateOption.li(labelElement, 'dropdown-header' + optgroupClass, optID)
          );

          mainData.push({
            display: config.label,
            subtext: config.subtext,
            type: 'optgroup-label',
            optID: optID
          });

          for (var j = 0, len = options.length; j < len; j++) {
            var option = options[j];

            if (j === 0) {
              headerIndex = mainData.length - 1;
              lastIndex = headerIndex + len;
            }

            addOption(option, {
              headerIndex: headerIndex,
              lastIndex: lastIndex,
              optID: optID,
              optgroupClass: optgroupClass,
              disabled: optgroup.disabled
            });
          }

          if (next) {
            addDivider({
              optID: optID
            });
          }
        }

        for (var len = selectOptions.length; startIndex < len; startIndex++) {
          var item = selectOptions[startIndex];

          if (item.tagName !== 'OPTGROUP') {
            addOption(item, {});
          } else {
            addOptgroup(startIndex, selectOptions);
          }
        }

        this.selectpicker.main.elements = mainElements;
        this.selectpicker.main.data = mainData;

        this.selectpicker.current = this.selectpicker.main;
      },

      findLis: function() {
        return this.$menuInner.find('.inner > li');
      },

      render: function() {
        // ensure titleOption is appended and selected (if necessary) before getting selectedOptions
        this.setPlaceholder();

        var that = this,
          element = this.$element[0],
          selectedOptions = getSelectedOptions(element, this.options.hideDisabled),
          selectedCount = selectedOptions.length,
          button = this.$button[0],
          buttonInner = button.querySelector('.filter-option-inner-inner'),
          multipleSeparator = document.createTextNode(this.options.multipleSeparator),
          titleFragment = elementTemplates.fragment.cloneNode(false),
          showCount,
          countMax,
          hasContent = false;

        button.classList.toggle('bs-placeholder', that.multiple ? !selectedCount : !getSelectValues(element, selectedOptions));

        this.tabIndex();

        if (this.options.selectedTextFormat === 'static') {
          titleFragment = generateOption.text({
            text: this.options.title
          }, true);
        } else {
          showCount = this.multiple && this.options.selectedTextFormat.indexOf('count') !== -1 && selectedCount > 1;

          // determine if the number of selected options will be shown (showCount === true)
          if (showCount) {
            countMax = this.options.selectedTextFormat.split('>');
            showCount = (countMax.length > 1 && selectedCount > countMax[1]) || (countMax.length === 1 && selectedCount >= 2);
          }

          // only loop through all selected options if the count won't be shown
          if (showCount === false) {
            for (var selectedIndex = 0; selectedIndex < selectedCount; selectedIndex++) {
              if (selectedIndex < 50) {
                var option = selectedOptions[selectedIndex],
                  titleOptions = {},
                  thisData = {
                    content: option.getAttribute('data-content'),
                    subtext: option.getAttribute('data-subtext'),
                    icon: option.getAttribute('data-icon')
                  };

                if (this.multiple && selectedIndex > 0) {
                  titleFragment.appendChild(multipleSeparator.cloneNode(false));
                }

                if (option.title) {
                  titleOptions.text = option.title;
                } else if (thisData.content && that.options.showContent) {
                  titleOptions.content = thisData.content.toString();
                  hasContent = true;
                } else {
                  if (that.options.showIcon) {
                    titleOptions.icon = thisData.icon;
                    titleOptions.iconBase = this.options.iconBase;
                  }
                  if (that.options.showSubtext && !that.multiple && thisData.subtext) titleOptions.subtext = ' ' + thisData.subtext;
                  titleOptions.text = option.textContent.trim();
                }

                titleFragment.appendChild(generateOption.text(titleOptions, true));
              } else {
                break;
              }
            }

            // add ellipsis
            if (selectedCount > 49) {
              titleFragment.appendChild(document.createTextNode('...'));
            }
          } else {
            var optionSelector = ':not([hidden]):not([data-hidden="true"]):not([data-divider="true"])';
            if (this.options.hideDisabled) optionSelector += ':not(:disabled)';

            // If this is a multiselect, and selectedTextFormat is count, then show 1 of 2 selected, etc.
            var totalCount = this.$element[0].querySelectorAll('select > option' + optionSelector + ', optgroup' + optionSelector + ' option' + optionSelector).length,
              tr8nText = (typeof this.options.countSelectedText === 'function') ? this.options.countSelectedText(selectedCount, totalCount) : this.options.countSelectedText;

            titleFragment = generateOption.text({
              text: tr8nText.replace('{0}', selectedCount.toString()).replace('{1}', totalCount.toString())
            }, true);
          }
        }

        if (this.options.title == undefined) {
          // use .attr to ensure undefined is returned if title attribute is not set
          this.options.title = this.$element.attr('title');
        }

        // If the select doesn't have a title, then use the default, or if nothing is set at all, use noneSelectedText
        if (!titleFragment.childNodes.length) {
          titleFragment = generateOption.text({
            text: typeof this.options.title !== 'undefined' ? this.options.title : this.options.noneSelectedText
          }, true);
        }

        // strip all HTML tags and trim the result, then unescape any escaped tags
        button.title = titleFragment.textContent.replace(/<[^>]*>?/g, '').trim();

        if (this.options.sanitize && hasContent) {
          sanitizeHtml([titleFragment], that.options.whiteList, that.options.sanitizeFn);
        }

        buttonInner.innerHTML = '';
        buttonInner.appendChild(titleFragment);

        if (version.major < 4 && this.$newElement[0].classList.contains('bs3-has-addon')) {
          var filterExpand = button.querySelector('.filter-expand'),
            clone = buttonInner.cloneNode(true);

          clone.className = 'filter-expand';

          if (filterExpand) {
            button.replaceChild(clone, filterExpand);
          } else {
            button.appendChild(clone);
          }
        }

        this.$element.trigger('rendered' + EVENT_KEY);
      },

      /**
       * @param [style]
       * @param [status]
       */
      setStyle: function(newStyle, status) {
        var button = this.$button[0],
          newElement = this.$newElement[0],
          style = this.options.style.trim(),
          buttonClass;

        if (this.$element.attr('class')) {
          this.$newElement.addClass(this.$element.attr('class').replace(/selectpicker|mobile-device|bs-select-hidden|validate\[.*\]/gi, ''));
        }

        if (version.major < 4) {
          newElement.classList.add('bs3');

          if (newElement.parentNode.classList.contains('input-group') &&
            (newElement.previousElementSibling || newElement.nextElementSibling) &&
            (newElement.previousElementSibling || newElement.nextElementSibling).classList.contains('input-group-addon')
          ) {
            newElement.classList.add('bs3-has-addon');
          }
        }

        if (newStyle) {
          buttonClass = newStyle.trim();
        } else {
          buttonClass = style;
        }

        if (status == 'add') {
          if (buttonClass) button.classList.add.apply(button.classList, buttonClass.split(' '));
        } else if (status == 'remove') {
          if (buttonClass) button.classList.remove.apply(button.classList, buttonClass.split(' '));
        } else {
          if (style) button.classList.remove.apply(button.classList, style.split(' '));
          if (buttonClass) button.classList.add.apply(button.classList, buttonClass.split(' '));
        }
      },

      liHeight: function(refresh) {
        if (!refresh && (this.options.size === false || this.sizeInfo)) return;

        if (!this.sizeInfo) this.sizeInfo = {};

        var newElement = document.createElement('div'),
          menu = document.createElement('div'),
          menuInner = document.createElement('div'),
          menuInnerInner = document.createElement('ul'),
          divider = document.createElement('li'),
          dropdownHeader = document.createElement('li'),
          li = document.createElement('li'),
          a = document.createElement('a'),
          text = document.createElement('span'),
          header = this.options.header && this.$menu.find('.' + classNames.POPOVERHEADER).length > 0 ? this.$menu.find('.' + classNames.POPOVERHEADER)[0].cloneNode(true) : null,
          search = this.options.liveSearch ? document.createElement('div') : null,
          actions = this.options.actionsBox && this.multiple && this.$menu.find('.bs-actionsbox').length > 0 ? this.$menu.find('.bs-actionsbox')[0].cloneNode(true) : null,
          doneButton = this.options.doneButton && this.multiple && this.$menu.find('.bs-donebutton').length > 0 ? this.$menu.find('.bs-donebutton')[0].cloneNode(true) : null,
          firstOption = this.$element.find('option')[0];

        this.sizeInfo.selectWidth = this.$newElement[0].offsetWidth;

        text.className = 'text';
        a.className = 'dropdown-item ' + (firstOption ? firstOption.className : '');
        newElement.className = this.$menu[0].parentNode.className + ' ' + classNames.SHOW;
        newElement.style.width = 0; // ensure button width doesn't affect natural width of menu when calculating
        if (this.options.width === 'auto') menu.style.minWidth = 0;
        menu.className = classNames.MENU + ' ' + classNames.SHOW;
        menuInner.className = 'inner ' + classNames.SHOW;
        menuInnerInner.className = classNames.MENU + ' inner ' + (version.major === '4' ? classNames.SHOW : '');
        divider.className = classNames.DIVIDER;
        dropdownHeader.className = 'dropdown-header';

        text.appendChild(document.createTextNode('\u200b'));
        a.appendChild(text);
        li.appendChild(a);
        dropdownHeader.appendChild(text.cloneNode(true));

        if (this.selectpicker.view.widestOption) {
          menuInnerInner.appendChild(this.selectpicker.view.widestOption.cloneNode(true));
        }

        menuInnerInner.appendChild(li);
        menuInnerInner.appendChild(divider);
        menuInnerInner.appendChild(dropdownHeader);
        if (header) menu.appendChild(header);
        if (search) {
          var input = document.createElement('input');
          search.className = 'bs-searchbox';
          input.className = 'form-control';
          search.appendChild(input);
          menu.appendChild(search);
        }
        if (actions) menu.appendChild(actions);
        menuInner.appendChild(menuInnerInner);
        menu.appendChild(menuInner);
        if (doneButton) menu.appendChild(doneButton);
        newElement.appendChild(menu);

        document.body.appendChild(newElement);

        var liHeight = li.offsetHeight,
          dropdownHeaderHeight = dropdownHeader ? dropdownHeader.offsetHeight : 0,
          headerHeight = header ? header.offsetHeight : 0,
          searchHeight = search ? search.offsetHeight : 0,
          actionsHeight = actions ? actions.offsetHeight : 0,
          doneButtonHeight = doneButton ? doneButton.offsetHeight : 0,
          dividerHeight = $(divider).outerHeight(true),
          // fall back to jQuery if getComputedStyle is not supported
          menuStyle = window.getComputedStyle ? window.getComputedStyle(menu) : false,
          menuWidth = menu.offsetWidth,
          $menu = menuStyle ? null : $(menu),
          menuPadding = {
            vert: toInteger(menuStyle ? menuStyle.paddingTop : $menu.css('paddingTop')) +
              toInteger(menuStyle ? menuStyle.paddingBottom : $menu.css('paddingBottom')) +
              toInteger(menuStyle ? menuStyle.borderTopWidth : $menu.css('borderTopWidth')) +
              toInteger(menuStyle ? menuStyle.borderBottomWidth : $menu.css('borderBottomWidth')),
            horiz: toInteger(menuStyle ? menuStyle.paddingLeft : $menu.css('paddingLeft')) +
              toInteger(menuStyle ? menuStyle.paddingRight : $menu.css('paddingRight')) +
              toInteger(menuStyle ? menuStyle.borderLeftWidth : $menu.css('borderLeftWidth')) +
              toInteger(menuStyle ? menuStyle.borderRightWidth : $menu.css('borderRightWidth'))
          },
          menuExtras = {
            vert: menuPadding.vert +
              toInteger(menuStyle ? menuStyle.marginTop : $menu.css('marginTop')) +
              toInteger(menuStyle ? menuStyle.marginBottom : $menu.css('marginBottom')) + 2,
            horiz: menuPadding.horiz +
              toInteger(menuStyle ? menuStyle.marginLeft : $menu.css('marginLeft')) +
              toInteger(menuStyle ? menuStyle.marginRight : $menu.css('marginRight')) + 2
          },
          scrollBarWidth;

        menuInner.style.overflowY = 'scroll';

        scrollBarWidth = menu.offsetWidth - menuWidth;

        document.body.removeChild(newElement);

        this.sizeInfo.liHeight = liHeight;
        this.sizeInfo.dropdownHeaderHeight = dropdownHeaderHeight;
        this.sizeInfo.headerHeight = headerHeight;
        this.sizeInfo.searchHeight = searchHeight;
        this.sizeInfo.actionsHeight = actionsHeight;
        this.sizeInfo.doneButtonHeight = doneButtonHeight;
        this.sizeInfo.dividerHeight = dividerHeight;
        this.sizeInfo.menuPadding = menuPadding;
        this.sizeInfo.menuExtras = menuExtras;
        this.sizeInfo.menuWidth = menuWidth;
        this.sizeInfo.menuInnerInnerWidth = menuWidth - menuPadding.horiz;
        this.sizeInfo.totalMenuWidth = this.sizeInfo.menuWidth;
        this.sizeInfo.scrollBarWidth = scrollBarWidth;
        this.sizeInfo.selectHeight = this.$newElement[0].offsetHeight;

        this.setPositionData();
      },

      getSelectPosition: function() {
        var that = this,
          $window = $(window),
          pos = that.$newElement.offset(),
          $container = $(that.options.container),
          containerPos;

        if (that.options.container && $container.length && !$container.is('body')) {
          containerPos = $container.offset();
          containerPos.top += parseInt($container.css('borderTopWidth'));
          containerPos.left += parseInt($container.css('borderLeftWidth'));
        } else {
          containerPos = {
            top: 0,
            left: 0
          };
        }

        var winPad = that.options.windowPadding;

        this.sizeInfo.selectOffsetTop = pos.top - containerPos.top - $window.scrollTop();
        this.sizeInfo.selectOffsetBot = $window.height() - this.sizeInfo.selectOffsetTop - this.sizeInfo.selectHeight - containerPos.top - winPad[2];
        this.sizeInfo.selectOffsetLeft = pos.left - containerPos.left - $window.scrollLeft();
        this.sizeInfo.selectOffsetRight = $window.width() - this.sizeInfo.selectOffsetLeft - this.sizeInfo.selectWidth - containerPos.left - winPad[1];
        this.sizeInfo.selectOffsetTop -= winPad[0];
        this.sizeInfo.selectOffsetLeft -= winPad[3];
      },

      setMenuSize: function(isAuto) {
        this.getSelectPosition();

        var selectWidth = this.sizeInfo.selectWidth,
          liHeight = this.sizeInfo.liHeight,
          headerHeight = this.sizeInfo.headerHeight,
          searchHeight = this.sizeInfo.searchHeight,
          actionsHeight = this.sizeInfo.actionsHeight,
          doneButtonHeight = this.sizeInfo.doneButtonHeight,
          divHeight = this.sizeInfo.dividerHeight,
          menuPadding = this.sizeInfo.menuPadding,
          menuInnerHeight,
          menuHeight,
          divLength = 0,
          minHeight,
          _minHeight,
          maxHeight,
          menuInnerMinHeight,
          estimate;

        if (this.options.dropupAuto) {
          // Get the estimated height of the menu without scrollbars.
          // This is useful for smaller menus, where there might be plenty of room
          // below the button without setting dropup, but we can't know
          // the exact height of the menu until createView is called later
          estimate = liHeight * this.selectpicker.current.elements.length + menuPadding.vert;
          this.$newElement.toggleClass(classNames.DROPUP, this.sizeInfo.selectOffsetTop - this.sizeInfo.selectOffsetBot > this.sizeInfo.menuExtras.vert && estimate + this.sizeInfo.menuExtras.vert + 50 > this.sizeInfo.selectOffsetBot);
        }

        if (this.options.size === 'auto') {
          _minHeight = this.selectpicker.current.elements.length > 3 ? this.sizeInfo.liHeight * 3 + this.sizeInfo.menuExtras.vert - 2 : 0;
          menuHeight = this.sizeInfo.selectOffsetBot - this.sizeInfo.menuExtras.vert;
          minHeight = _minHeight + headerHeight + searchHeight + actionsHeight + doneButtonHeight;
          menuInnerMinHeight = Math.max(_minHeight - menuPadding.vert, 0);

          if (this.$newElement.hasClass(classNames.DROPUP)) {
            menuHeight = this.sizeInfo.selectOffsetTop - this.sizeInfo.menuExtras.vert;
          }

          maxHeight = menuHeight;
          menuInnerHeight = menuHeight - headerHeight - searchHeight - actionsHeight - doneButtonHeight - menuPadding.vert;
        } else if (this.options.size && this.options.size != 'auto' && this.selectpicker.current.elements.length > this.options.size) {
          for (var i = 0; i < this.options.size; i++) {
            if (this.selectpicker.current.data[i].type === 'divider') divLength++;
          }

          menuHeight = liHeight * this.options.size + divLength * divHeight + menuPadding.vert;
          menuInnerHeight = menuHeight - menuPadding.vert;
          maxHeight = menuHeight + headerHeight + searchHeight + actionsHeight + doneButtonHeight;
          minHeight = menuInnerMinHeight = '';
        }

        this.$menu.css({
          'max-height': maxHeight + 'px',
          'overflow': 'hidden',
          'min-height': minHeight + 'px'
        });

        this.$menuInner.css({
          'max-height': menuInnerHeight + 'px',
          'overflow-y': 'auto',
          'min-height': menuInnerMinHeight + 'px'
        });

        // ensure menuInnerHeight is always a positive number to prevent issues calculating chunkSize in createView
        this.sizeInfo.menuInnerHeight = Math.max(menuInnerHeight, 1);

        if (this.selectpicker.current.data.length && this.selectpicker.current.data[this.selectpicker.current.data.length - 1].position > this.sizeInfo.menuInnerHeight) {
          this.sizeInfo.hasScrollBar = true;
          this.sizeInfo.totalMenuWidth = this.sizeInfo.menuWidth + this.sizeInfo.scrollBarWidth;
        }

        if (this.options.dropdownAlignRight === 'auto') {
          this.$menu.toggleClass(classNames.MENURIGHT, this.sizeInfo.selectOffsetLeft > this.sizeInfo.selectOffsetRight && this.sizeInfo.selectOffsetRight < (this.sizeInfo.totalMenuWidth - selectWidth));
        }

        if (this.dropdown && this.dropdown._popper) this.dropdown._popper.update();
      },

      setSize: function(refresh) {
        this.liHeight(refresh);

        if (this.options.header) this.$menu.css('padding-top', 0);
        if (this.options.size === false) return;

        var that = this,
          $window = $(window);

        this.setMenuSize();

        if (this.options.liveSearch) {
          this.$searchbox
            .off('input.setMenuSize propertychange.setMenuSize')
            .on('input.setMenuSize propertychange.setMenuSize', function() {
              return that.setMenuSize();
            });
        }

        if (this.options.size === 'auto') {
          $window
            .off('resize' + EVENT_KEY + '.' + this.selectId + '.setMenuSize' + ' scroll' + EVENT_KEY + '.' + this.selectId + '.setMenuSize')
            .on('resize' + EVENT_KEY + '.' + this.selectId + '.setMenuSize' + ' scroll' + EVENT_KEY + '.' + this.selectId + '.setMenuSize', function() {
              return that.setMenuSize();
            });
        } else if (this.options.size && this.options.size != 'auto' && this.selectpicker.current.elements.length > this.options.size) {
          $window.off('resize' + EVENT_KEY + '.' + this.selectId + '.setMenuSize' + ' scroll' + EVENT_KEY + '.' + this.selectId + '.setMenuSize');
        }

        that.createView(false, true, refresh);
      },

      setWidth: function() {
        var that = this;

        if (this.options.width === 'auto') {
          requestAnimationFrame(function() {
            that.$menu.css('min-width', '0');

            that.$element.on('loaded' + EVENT_KEY, function() {
              that.liHeight();
              that.setMenuSize();

              // Get correct width if element is hidden
              var $selectClone = that.$newElement.clone().appendTo('body'),
                btnWidth = $selectClone.css('width', 'auto').children('button').outerWidth();

              $selectClone.remove();

              // Set width to whatever's larger, button title or longest option
              that.sizeInfo.selectWidth = Math.max(that.sizeInfo.totalMenuWidth, btnWidth);
              that.$newElement.css('width', that.sizeInfo.selectWidth + 'px');
            });
          });
        } else if (this.options.width === 'fit') {
          // Remove inline min-width so width can be changed from 'auto'
          this.$menu.css('min-width', '');
          this.$newElement.css('width', '').addClass('fit-width');
        } else if (this.options.width) {
          // Remove inline min-width so width can be changed from 'auto'
          this.$menu.css('min-width', '');
          this.$newElement.css('width', this.options.width);
        } else {
          // Remove inline min-width/width so width can be changed
          this.$menu.css('min-width', '');
          this.$newElement.css('width', '');
        }
        // Remove fit-width class if width is changed programmatically
        if (this.$newElement.hasClass('fit-width') && this.options.width !== 'fit') {
          this.$newElement[0].classList.remove('fit-width');
        }
      },

      selectPosition: function() {
        this.$bsContainer = $('<div class="bs-container" />');

        var that = this,
          $container = $(this.options.container),
          pos,
          containerPos,
          actualHeight,
          getPlacement = function($element) {
            var containerPosition = {},
              // fall back to dropdown's default display setting if display is not manually set
              display = that.options.display || (
                // Bootstrap 3 doesn't have $.fn.dropdown.Constructor.Default
                $.fn.dropdown.Constructor.Default ? $.fn.dropdown.Constructor.Default.display :
                false
              );

            that.$bsContainer.addClass($element.attr('class').replace(/form-control|fit-width/gi, '')).toggleClass(classNames.DROPUP, $element.hasClass(classNames.DROPUP));
            pos = $element.offset();

            if (!$container.is('body')) {
              containerPos = $container.offset();
              containerPos.top += parseInt($container.css('borderTopWidth')) - $container.scrollTop();
              containerPos.left += parseInt($container.css('borderLeftWidth')) - $container.scrollLeft();
            } else {
              containerPos = {
                top: 0,
                left: 0
              };
            }

            actualHeight = $element.hasClass(classNames.DROPUP) ? 0 : $element[0].offsetHeight;

            // Bootstrap 4+ uses Popper for menu positioning
            if (version.major < 4 || display === 'static') {
              containerPosition.top = pos.top - containerPos.top + actualHeight;
              containerPosition.left = pos.left - containerPos.left;
            }

            containerPosition.width = $element[0].offsetWidth;

            that.$bsContainer.css(containerPosition);
          };

        this.$button.on('click.bs.dropdown.data-api', function() {
          if (that.isDisabled()) {
            return;
          }

          getPlacement(that.$newElement);

          that.$bsContainer
            .appendTo(that.options.container)
            .toggleClass(classNames.SHOW, !that.$button.hasClass(classNames.SHOW))
            .append(that.$menu);
        });

        $(window)
          .off('resize' + EVENT_KEY + '.' + this.selectId + ' scroll' + EVENT_KEY + '.' + this.selectId)
          .on('resize' + EVENT_KEY + '.' + this.selectId + ' scroll' + EVENT_KEY + '.' + this.selectId, function() {
            var isActive = that.$newElement.hasClass(classNames.SHOW);

            if (isActive) getPlacement(that.$newElement);
          });

        this.$element.on('hide' + EVENT_KEY, function() {
          that.$menu.data('height', that.$menu.height());
          that.$bsContainer.detach();
        });
      },

      setOptionStatus: function(selectedOnly) {
        var that = this;

        that.noScroll = false;

        if (that.selectpicker.view.visibleElements && that.selectpicker.view.visibleElements.length) {
          for (var i = 0; i < that.selectpicker.view.visibleElements.length; i++) {
            var liData = that.selectpicker.current.data[i + that.selectpicker.view.position0],
              option = liData.option;

            if (option) {
              if (selectedOnly !== true) {
                that.setDisabled(
                  liData.index,
                  liData.disabled
                );
              }

              that.setSelected(
                liData.index,
                option.selected
              );
            }
          }
        }
      },

      /**
       * @param {number} index - the index of the option that is being changed
       * @param {boolean} selected - true if the option is being selected, false if being deselected
       */
      setSelected: function(index, selected) {
        var li = this.selectpicker.main.elements[index],
          liData = this.selectpicker.main.data[index],
          activeIndexIsSet = this.activeIndex !== undefined,
          thisIsActive = this.activeIndex === index,
          prevActive,
          a,
          // if current option is already active
          // OR
          // if the current option is being selected, it's NOT multiple, and
          // activeIndex is undefined:
          //  - when the menu is first being opened, OR
          //  - after a search has been performed, OR
          //  - when retainActive is false when selecting a new option (i.e. index of the newly selected option is not the same as the current activeIndex)
          keepActive = thisIsActive || (selected && !this.multiple && !activeIndexIsSet);

        liData.selected = selected;

        a = li.firstChild;

        if (selected) {
          this.selectedIndex = index;
        }

        li.classList.toggle('selected', selected);

        if (keepActive) {
          this.focusItem(li, liData);
          this.selectpicker.view.currentActive = li;
          this.activeIndex = index;
        } else {
          this.defocusItem(li);
        }

        if (a) {
          a.classList.toggle('selected', selected);

          if (selected) {
            a.setAttribute('aria-selected', true);
          } else {
            if (this.multiple) {
              a.setAttribute('aria-selected', false);
            } else {
              a.removeAttribute('aria-selected');
            }
          }
        }

        if (!keepActive && !activeIndexIsSet && selected && this.prevActiveIndex !== undefined) {
          prevActive = this.selectpicker.main.elements[this.prevActiveIndex];

          this.defocusItem(prevActive);
        }
      },

      /**
       * @param {number} index - the index of the option that is being disabled
       * @param {boolean} disabled - true if the option is being disabled, false if being enabled
       */
      setDisabled: function(index, disabled) {
        var li = this.selectpicker.main.elements[index],
          a;

        this.selectpicker.main.data[index].disabled = disabled;

        a = li.firstChild;

        li.classList.toggle(classNames.DISABLED, disabled);

        if (a) {
          if (version.major === '4') a.classList.toggle(classNames.DISABLED, disabled);

          if (disabled) {
            a.setAttribute('aria-disabled', disabled);
            a.setAttribute('tabindex', -1);
          } else {
            a.removeAttribute('aria-disabled');
            a.setAttribute('tabindex', 0);
          }
        }
      },

      isDisabled: function() {
        return this.$element[0].disabled;
      },

      checkDisabled: function() {
        if (this.isDisabled()) {
          this.$newElement[0].classList.add(classNames.DISABLED);
          this.$button.addClass(classNames.DISABLED).attr('tabindex', -1).attr('aria-disabled', true);
        } else {
          if (this.$button[0].classList.contains(classNames.DISABLED)) {
            this.$newElement[0].classList.remove(classNames.DISABLED);
            this.$button.removeClass(classNames.DISABLED).attr('aria-disabled', false);
          }

          if (this.$button.attr('tabindex') == -1 && !this.$element.data('tabindex')) {
            this.$button.removeAttr('tabindex');
          }
        }
      },

      tabIndex: function() {
        if (this.$element.data('tabindex') !== this.$element.attr('tabindex') &&
          (this.$element.attr('tabindex') !== -98 && this.$element.attr('tabindex') !== '-98')) {
          this.$element.data('tabindex', this.$element.attr('tabindex'));
          this.$button.attr('tabindex', this.$element.data('tabindex'));
        }

        this.$element.attr('tabindex', -98);
      },

      clickListener: function() {
        var that = this,
          $document = $(document);

        $document.data('spaceSelect', false);

        this.$button.on('keyup', function(e) {
          if (/(32)/.test(e.keyCode.toString(10)) && $document.data('spaceSelect')) {
            e.preventDefault();
            $document.data('spaceSelect', false);
          }
        });

        this.$newElement.on('show.bs.dropdown', function() {
          if (version.major > 3 && !that.dropdown) {
            that.dropdown = that.$button.data('bs.dropdown');
            that.dropdown._menu = that.$menu[0];
          }
        });

        this.$button.on('click.bs.dropdown.data-api', function() {
          if (!that.$newElement.hasClass(classNames.SHOW)) {
            that.setSize();
          }
        });

        function setFocus() {
          if (that.options.liveSearch) {
            that.$searchbox.trigger('focus');
          } else {
            that.$menuInner.trigger('focus');
          }
        }

        function checkPopperExists() {
          if (that.dropdown && that.dropdown._popper && that.dropdown._popper.state.isCreated) {
            setFocus();
          } else {
            requestAnimationFrame(checkPopperExists);
          }
        }

        this.$element.on('shown' + EVENT_KEY, function() {
          if (that.$menuInner[0].scrollTop !== that.selectpicker.view.scrollTop) {
            that.$menuInner[0].scrollTop = that.selectpicker.view.scrollTop;
          }

          if (version.major > 3) {
            requestAnimationFrame(checkPopperExists);
          } else {
            setFocus();
          }
        });

        // ensure posinset and setsize are correct before selecting an option via a click
        this.$menuInner.on('mouseenter', 'li a', function(e) {
          var hoverLi = this.parentElement,
            position0 = that.isVirtual() ? that.selectpicker.view.position0 : 0,
            index = Array.prototype.indexOf.call(hoverLi.parentElement.children, hoverLi),
            hoverData = that.selectpicker.current.data[index + position0];

          that.focusItem(hoverLi, hoverData, true);
        });

        this.$menuInner.on('click', 'li a', function(e, retainActive) {
          var $this = $(this),
            element = that.$element[0],
            position0 = that.isVirtual() ? that.selectpicker.view.position0 : 0,
            clickedData = that.selectpicker.current.data[$this.parent().index() + position0],
            clickedIndex = clickedData.index,
            prevValue = getSelectValues(element),
            prevIndex = element.selectedIndex,
            prevOption = element.options[prevIndex],
            triggerChange = true;

          // Don't close on multi choice menu
          if (that.multiple && that.options.maxOptions !== 1) {
            e.stopPropagation();
          }

          e.preventDefault();

          // Don't run if the select is disabled
          if (!that.isDisabled() && !$this.parent().hasClass(classNames.DISABLED)) {
            var option = clickedData.option,
              $option = $(option),
              state = option.selected,
              $optgroup = $option.parent('optgroup'),
              $optgroupOptions = $optgroup.find('option'),
              maxOptions = that.options.maxOptions,
              maxOptionsGrp = $optgroup.data('maxOptions') || false;

            if (clickedIndex === that.activeIndex) retainActive = true;

            if (!retainActive) {
              that.prevActiveIndex = that.activeIndex;
              that.activeIndex = undefined;
            }

            if (!that.multiple) { // Deselect all others if not multi select box
              if (prevOption) prevOption.selected = false;
              option.selected = true;
              that.setSelected(clickedIndex, true);
            } else { // Toggle the one we have chosen if we are multi select.
              option.selected = !state;

              that.setSelected(clickedIndex, !state);
              $this.trigger('blur');

              if (maxOptions !== false || maxOptionsGrp !== false) {
                var maxReached = maxOptions < getSelectedOptions(element).length,
                  maxReachedGrp = maxOptionsGrp < $optgroup.find('option:selected').length;

                if ((maxOptions && maxReached) || (maxOptionsGrp && maxReachedGrp)) {
                  if (maxOptions && maxOptions == 1) {
                    element.selectedIndex = -1;
                    option.selected = true;
                    that.setOptionStatus(true);
                  } else if (maxOptionsGrp && maxOptionsGrp == 1) {
                    for (var i = 0; i < $optgroupOptions.length; i++) {
                      var _option = $optgroupOptions[i];
                      _option.selected = false;
                      that.setSelected(_option.liIndex, false);
                    }

                    option.selected = true;
                    that.setSelected(clickedIndex, true);
                  } else {
                    var maxOptionsText = typeof that.options.maxOptionsText === 'string' ? [that.options.maxOptionsText, that.options.maxOptionsText] : that.options.maxOptionsText,
                      maxOptionsArr = typeof maxOptionsText === 'function' ? maxOptionsText(maxOptions, maxOptionsGrp) : maxOptionsText,
                      maxTxt = maxOptionsArr[0].replace('{n}', maxOptions),
                      maxTxtGrp = maxOptionsArr[1].replace('{n}', maxOptionsGrp),
                      $notify = $('<div class="notify"></div>');
                    // If {var} is set in array, replace it
                    /** @deprecated */
                    if (maxOptionsArr[2]) {
                      maxTxt = maxTxt.replace('{var}', maxOptionsArr[2][maxOptions > 1 ? 0 : 1]);
                      maxTxtGrp = maxTxtGrp.replace('{var}', maxOptionsArr[2][maxOptionsGrp > 1 ? 0 : 1]);
                    }

                    option.selected = false;

                    that.$menu.append($notify);

                    if (maxOptions && maxReached) {
                      $notify.append($('<div>' + maxTxt + '</div>'));
                      triggerChange = false;
                      that.$element.trigger('maxReached' + EVENT_KEY);
                    }

                    if (maxOptionsGrp && maxReachedGrp) {
                      $notify.append($('<div>' + maxTxtGrp + '</div>'));
                      triggerChange = false;
                      that.$element.trigger('maxReachedGrp' + EVENT_KEY);
                    }

                    setTimeout(function() {
                      that.setSelected(clickedIndex, false);
                    }, 10);

                    $notify[0].classList.add('fadeOut');

                    setTimeout(function() {
                      $notify.remove();
                    }, 1050);
                  }
                }
              }
            }

            if (!that.multiple || (that.multiple && that.options.maxOptions === 1)) {
              that.$button.trigger('focus');
            } else if (that.options.liveSearch) {
              that.$searchbox.trigger('focus');
            }

            // Trigger select 'change'
            if (triggerChange) {
              if (that.multiple || prevIndex !== element.selectedIndex) {
                // $option.prop('selected') is current option state (selected/unselected). prevValue is the value of the select prior to being changed.
                changedArguments = [option.index, $option.prop('selected'), prevValue];
                that.$element
                  .triggerNative('change');
              }
            }
          }
        });

        this.$menu.on('click', 'li.' + classNames.DISABLED + ' a, .' + classNames.POPOVERHEADER + ', .' + classNames.POPOVERHEADER + ' :not(.close)', function(e) {
          if (e.currentTarget == this) {
            e.preventDefault();
            e.stopPropagation();
            if (that.options.liveSearch && !$(e.target).hasClass('close')) {
              that.$searchbox.trigger('focus');
            } else {
              that.$button.trigger('focus');
            }
          }
        });

        this.$menuInner.on('click', '.divider, .dropdown-header', function(e) {
          e.preventDefault();
          e.stopPropagation();
          if (that.options.liveSearch) {
            that.$searchbox.trigger('focus');
          } else {
            that.$button.trigger('focus');
          }
        });

        this.$menu.on('click', '.' + classNames.POPOVERHEADER + ' .close', function() {
          that.$button.trigger('click');
        });

        this.$searchbox.on('click', function(e) {
          e.stopPropagation();
        });

        this.$menu.on('click', '.actions-btn', function(e) {
          if (that.options.liveSearch) {
            that.$searchbox.trigger('focus');
          } else {
            that.$button.trigger('focus');
          }

          e.preventDefault();
          e.stopPropagation();

          if ($(this).hasClass('bs-select-all')) {
            that.selectAll();
          } else {
            that.deselectAll();
          }
        });

        this.$element
          .on('change' + EVENT_KEY, function() {
            that.render();
            that.$element.trigger('changed' + EVENT_KEY, changedArguments);
            changedArguments = null;
          })
          .on('focus' + EVENT_KEY, function() {
            if (!that.options.mobile) that.$button.trigger('focus');
          });
      },

      liveSearchListener: function() {
        var that = this,
          noResults = document.createElement('li');

        this.$button.on('click.bs.dropdown.data-api', function() {
          if (!!that.$searchbox.val()) {
            that.$searchbox.val('');
          }
        });

        this.$searchbox.on('click.bs.dropdown.data-api focus.bs.dropdown.data-api touchend.bs.dropdown.data-api', function(e) {
          e.stopPropagation();
        });

        this.$searchbox.on('input propertychange', function() {
          var searchValue = that.$searchbox.val();

          that.selectpicker.search.elements = [];
          that.selectpicker.search.data = [];

          if (searchValue) {
            var i,
              searchMatch = [],
              q = searchValue.toUpperCase(),
              cache = {},
              cacheArr = [],
              searchStyle = that._searchStyle(),
              normalizeSearch = that.options.liveSearchNormalize;

            if (normalizeSearch) q = normalizeToBase(q);

            that._$lisSelected = that.$menuInner.find('.selected');

            for (var i = 0; i < that.selectpicker.main.data.length; i++) {
              var li = that.selectpicker.main.data[i];

              if (!cache[i]) {
                cache[i] = stringSearch(li, q, searchStyle, normalizeSearch);
              }

              if (cache[i] && li.headerIndex !== undefined && cacheArr.indexOf(li.headerIndex) === -1) {
                if (li.headerIndex > 0) {
                  cache[li.headerIndex - 1] = true;
                  cacheArr.push(li.headerIndex - 1);
                }

                cache[li.headerIndex] = true;
                cacheArr.push(li.headerIndex);

                cache[li.lastIndex + 1] = true;
              }

              if (cache[i] && li.type !== 'optgroup-label') cacheArr.push(i);
            }

            for (var i = 0, cacheLen = cacheArr.length; i < cacheLen; i++) {
              var index = cacheArr[i],
                prevIndex = cacheArr[i - 1],
                li = that.selectpicker.main.data[index],
                liPrev = that.selectpicker.main.data[prevIndex];

              if (li.type !== 'divider' || (li.type === 'divider' && liPrev && liPrev.type !== 'divider' && cacheLen - 1 !== i)) {
                that.selectpicker.search.data.push(li);
                searchMatch.push(that.selectpicker.main.elements[index]);
              }
            }

            that.activeIndex = undefined;
            that.noScroll = true;
            that.$menuInner.scrollTop(0);
            that.selectpicker.search.elements = searchMatch;
            that.createView(true);

            if (!searchMatch.length) {
              noResults.className = 'no-results';
              noResults.innerHTML = that.options.noneResultsText.replace('{0}', '"' + htmlEscape(searchValue) + '"');
              that.$menuInner[0].firstChild.appendChild(noResults);
            }
          } else {
            that.$menuInner.scrollTop(0);
            that.createView(false);
          }
        });
      },

      _searchStyle: function() {
        return this.options.liveSearchStyle || 'contains';
      },

      val: function(value) {
        var element = this.$element[0];

        if (typeof value !== 'undefined') {
          var prevValue = getSelectValues(element);

          changedArguments = [null, null, prevValue];

          this.$element
            .val(value)
            .trigger('changed' + EVENT_KEY, changedArguments);

          if (this.$newElement.hasClass(classNames.SHOW)) {
            if (this.multiple) {
              this.setOptionStatus(true);
            } else {
              var liSelectedIndex = (element.options[element.selectedIndex] || {}).liIndex;

              if (typeof liSelectedIndex === 'number') {
                this.setSelected(this.selectedIndex, false);
                this.setSelected(liSelectedIndex, true);
              }
            }
          }

          this.render();

          changedArguments = null;

          return this.$element;
        } else {
          return this.$element.val();
        }
      },

      changeAll: function(status) {
        if (!this.multiple) return;
        if (typeof status === 'undefined') status = true;

        var element = this.$element[0],
          previousSelected = 0,
          currentSelected = 0,
          prevValue = getSelectValues(element);

        element.classList.add('bs-select-hidden');

        for (var i = 0, len = this.selectpicker.current.elements.length; i < len; i++) {
          var liData = this.selectpicker.current.data[i],
            option = liData.option;

          if (option && !liData.disabled && liData.type !== 'divider') {
            if (liData.selected) previousSelected++;
            option.selected = status;
            if (status) currentSelected++;
          }
        }

        element.classList.remove('bs-select-hidden');

        if (previousSelected === currentSelected) return;

        this.setOptionStatus();

        changedArguments = [null, null, prevValue];

        this.$element
          .triggerNative('change');
      },

      selectAll: function() {
        return this.changeAll(true);
      },

      deselectAll: function() {
        return this.changeAll(false);
      },

      toggle: function(e) {
        e = e || window.event;

        if (e) e.stopPropagation();

        this.$button.trigger('click.bs.dropdown.data-api');
      },

      keydown: function(e) {
        var $this = $(this),
          isToggle = $this.hasClass('dropdown-toggle'),
          $parent = isToggle ? $this.closest('.dropdown') : $this.closest(Selector.MENU),
          that = $parent.data('this'),
          $items = that.findLis(),
          index,
          isActive,
          liActive,
          activeLi,
          offset,
          updateScroll = false,
          downOnTab = e.which === keyCodes.TAB && !isToggle && !that.options.selectOnTab,
          isArrowKey = REGEXP_ARROW.test(e.which) || downOnTab,
          scrollTop = that.$menuInner[0].scrollTop,
          isVirtual = that.isVirtual(),
          position0 = isVirtual === true ? that.selectpicker.view.position0 : 0;

        // do nothing if a function key is pressed
        if (e.which >= 112 && e.which <= 123) return;

        isActive = that.$newElement.hasClass(classNames.SHOW);

        if (
          !isActive &&
          (
            isArrowKey ||
            (e.which >= 48 && e.which <= 57) ||
            (e.which >= 96 && e.which <= 105) ||
            (e.which >= 65 && e.which <= 90)
          )
        ) {
          that.$button.trigger('click.bs.dropdown.data-api');

          if (that.options.liveSearch) {
            that.$searchbox.trigger('focus');
            return;
          }
        }

        if (e.which === keyCodes.ESCAPE && isActive) {
          e.preventDefault();
          that.$button.trigger('click.bs.dropdown.data-api').trigger('focus');
        }

        if (isArrowKey) { // if up or down
          if (!$items.length) return;

          liActive = that.selectpicker.main.elements[that.activeIndex];
          index = liActive ? Array.prototype.indexOf.call(liActive.parentElement.children, liActive) : -1;

          if (index !== -1) {
            that.defocusItem(liActive);
          }

          if (e.which === keyCodes.ARROW_UP) { // up
            if (index !== -1) index--;
            if (index + position0 < 0) index += $items.length;

            if (!that.selectpicker.view.canHighlight[index + position0]) {
              index = that.selectpicker.view.canHighlight.slice(0, index + position0).lastIndexOf(true) - position0;
              if (index === -1) index = $items.length - 1;
            }
          } else if (e.which === keyCodes.ARROW_DOWN || downOnTab) { // down
            index++;
            if (index + position0 >= that.selectpicker.view.canHighlight.length) index = 0;

            if (!that.selectpicker.view.canHighlight[index + position0]) {
              index = index + 1 + that.selectpicker.view.canHighlight.slice(index + position0 + 1).indexOf(true);
            }
          }

          e.preventDefault();

          var liActiveIndex = position0 + index;

          if (e.which === keyCodes.ARROW_UP) { // up
            // scroll to bottom and highlight last option
            if (position0 === 0 && index === $items.length - 1) {
              that.$menuInner[0].scrollTop = that.$menuInner[0].scrollHeight;

              liActiveIndex = that.selectpicker.current.elements.length - 1;
            } else {
              activeLi = that.selectpicker.current.data[liActiveIndex];
              offset = activeLi.position - activeLi.height;

              updateScroll = offset < scrollTop;
            }
          } else if (e.which === keyCodes.ARROW_DOWN || downOnTab) { // down
            // scroll to top and highlight first option
            if (index === 0) {
              that.$menuInner[0].scrollTop = 0;

              liActiveIndex = 0;
            } else {
              activeLi = that.selectpicker.current.data[liActiveIndex];
              offset = activeLi.position - that.sizeInfo.menuInnerHeight;

              updateScroll = offset > scrollTop;
            }
          }

          liActive = that.selectpicker.current.elements[liActiveIndex];

          that.activeIndex = that.selectpicker.current.data[liActiveIndex].index;

          that.focusItem(liActive);

          that.selectpicker.view.currentActive = liActive;

          if (updateScroll) that.$menuInner[0].scrollTop = offset;

          if (that.options.liveSearch) {
            that.$searchbox.trigger('focus');
          } else {
            $this.trigger('focus');
          }
        } else if (
          (!$this.is('input') && !REGEXP_TAB_OR_ESCAPE.test(e.which)) ||
          (e.which === keyCodes.SPACE && that.selectpicker.keydown.keyHistory)
        ) {
          var searchMatch,
            matches = [],
            keyHistory;

          e.preventDefault();

          that.selectpicker.keydown.keyHistory += keyCodeMap[e.which];

          if (that.selectpicker.keydown.resetKeyHistory.cancel) clearTimeout(that.selectpicker.keydown.resetKeyHistory.cancel);
          that.selectpicker.keydown.resetKeyHistory.cancel = that.selectpicker.keydown.resetKeyHistory.start();

          keyHistory = that.selectpicker.keydown.keyHistory;

          // if all letters are the same, set keyHistory to just the first character when searching
          if (/^(.)\1+$/.test(keyHistory)) {
            keyHistory = keyHistory.charAt(0);
          }

          // find matches
          for (var i = 0; i < that.selectpicker.current.data.length; i++) {
            var li = that.selectpicker.current.data[i],
              hasMatch;

            hasMatch = stringSearch(li, keyHistory, 'startsWith', true);

            if (hasMatch && that.selectpicker.view.canHighlight[i]) {
              matches.push(li.index);
            }
          }

          if (matches.length) {
            var matchIndex = 0;

            $items.removeClass('active').find('a').removeClass('active');

            // either only one key has been pressed or they are all the same key
            if (keyHistory.length === 1) {
              matchIndex = matches.indexOf(that.activeIndex);

              if (matchIndex === -1 || matchIndex === matches.length - 1) {
                matchIndex = 0;
              } else {
                matchIndex++;
              }
            }

            searchMatch = matches[matchIndex];

            activeLi = that.selectpicker.main.data[searchMatch];

            if (scrollTop - activeLi.position > 0) {
              offset = activeLi.position - activeLi.height;
              updateScroll = true;
            } else {
              offset = activeLi.position - that.sizeInfo.menuInnerHeight;
              // if the option is already visible at the current scroll position, just keep it the same
              updateScroll = activeLi.position > scrollTop + that.sizeInfo.menuInnerHeight;
            }

            liActive = that.selectpicker.main.elements[searchMatch];

            that.activeIndex = matches[matchIndex];

            that.focusItem(liActive);

            if (liActive) liActive.firstChild.focus();

            if (updateScroll) that.$menuInner[0].scrollTop = offset;

            $this.trigger('focus');
          }
        }

        // Select focused option if "Enter", "Spacebar" or "Tab" (when selectOnTab is true) are pressed inside the menu.
        if (
          isActive &&
          (
            (e.which === keyCodes.SPACE && !that.selectpicker.keydown.keyHistory) ||
            e.which === keyCodes.ENTER ||
            (e.which === keyCodes.TAB && that.options.selectOnTab)
          )
        ) {
          if (e.which !== keyCodes.SPACE) e.preventDefault();

          if (!that.options.liveSearch || e.which !== keyCodes.SPACE) {
            that.$menuInner.find('.active a').trigger('click', true); // retain active class
            $this.trigger('focus');

            if (!that.options.liveSearch) {
              // Prevent screen from scrolling if the user hits the spacebar
              e.preventDefault();
              // Fixes spacebar selection of dropdown items in FF & IE
              $(document).data('spaceSelect', true);
            }
          }
        }
      },

      mobile: function() {
        this.$element[0].classList.add('mobile-device');
      },

      refresh: function() {
        // update options if data attributes have been changed
        var config = $.extend({}, this.options, this.$element.data());
        this.options = config;

        this.checkDisabled();
        this.setStyle();
        this.render();
        this.createLi();
        this.setWidth();

        this.setSize(true);

        this.$element.trigger('refreshed' + EVENT_KEY);
      },

      hide: function() {
        this.$newElement.hide();
      },

      show: function() {
        this.$newElement.show();
      },

      remove: function() {
        this.$newElement.remove();
        this.$element.remove();
      },

      destroy: function() {
        this.$newElement.before(this.$element).remove();

        if (this.$bsContainer) {
          this.$bsContainer.remove();
        } else {
          this.$menu.remove();
        }

        this.$element
          .off(EVENT_KEY)
          .removeData('selectpicker')
          .removeClass('bs-select-hidden selectpicker');

        $(window).off(EVENT_KEY + '.' + this.selectId);
      }
    };

    // SELECTPICKER PLUGIN DEFINITION
    // ==============================
    function Plugin(option) {
      // get the args of the outer function..
      var args = arguments;
      // The arguments of the function are explicitly re-defined from the argument list, because the shift causes them
      // to get lost/corrupted in android 2.3 and IE9 #715 #775
      var _option = option;

      [].shift.apply(args);

      // if the version was not set successfully
      if (!version.success) {
        // try to retreive it again
        try {
          version.full = ($.fn.dropdown.Constructor.VERSION || '').split(' ')[0].split('.');
        } catch (err) {
          // fall back to use BootstrapVersion if set
          if (Selectpicker.BootstrapVersion) {
            version.full = Selectpicker.BootstrapVersion.split(' ')[0].split('.');
          } else {
            version.full = [version.major, '0', '0'];

            console.warn(
              'There was an issue retrieving Bootstrap\'s version. ' +
              'Ensure Bootstrap is being loaded before bootstrap-select and there is no namespace collision. ' +
              'If loading Bootstrap asynchronously, the version may need to be manually specified via $.fn.selectpicker.Constructor.BootstrapVersion.',
              err
            );
          }
        }

        version.major = version.full[0];
        version.success = true;
      }

      if (version.major === '4') {
        // some defaults need to be changed if using Bootstrap 4
        // check to see if they have already been manually changed before forcing them to update
        var toUpdate = [];

        if (Selectpicker.DEFAULTS.style === classNames.BUTTONCLASS) toUpdate.push({
          name: 'style',
          className: 'BUTTONCLASS'
        });
        if (Selectpicker.DEFAULTS.iconBase === classNames.ICONBASE) toUpdate.push({
          name: 'iconBase',
          className: 'ICONBASE'
        });
        if (Selectpicker.DEFAULTS.tickIcon === classNames.TICKICON) toUpdate.push({
          name: 'tickIcon',
          className: 'TICKICON'
        });

        classNames.DIVIDER = 'dropdown-divider';
        classNames.SHOW = 'show';
        classNames.BUTTONCLASS = 'btn-light';
        classNames.POPOVERHEADER = 'popover-header';
        classNames.ICONBASE = '';
        classNames.TICKICON = 'material-icons';

        for (var i = 0; i < toUpdate.length; i++) {
          var option = toUpdate[i];
          Selectpicker.DEFAULTS[option.name] = classNames[option.className];
        }
      }

      var value;
      var chain = this.each(function() {
        var $this = $(this);
        if ($this.is('select')) {
          var data = $this.data('selectpicker'),
            options = typeof _option == 'object' && _option;

          if (!data) {
            var dataAttributes = $this.data();

            for (var dataAttr in dataAttributes) {
              if (dataAttributes.hasOwnProperty(dataAttr) && $.inArray(dataAttr, DISALLOWED_ATTRIBUTES) !== -1) {
                delete dataAttributes[dataAttr];
              }
            }

            var config = $.extend({}, Selectpicker.DEFAULTS, $.fn.selectpicker.defaults || {}, dataAttributes, options);
            config.template = $.extend({}, Selectpicker.DEFAULTS.template, ($.fn.selectpicker.defaults ? $.fn.selectpicker.defaults.template : {}), dataAttributes.template, options.template);
            $this.data('selectpicker', (data = new Selectpicker(this, config)));
          } else if (options) {
            for (var i in options) {
              if (options.hasOwnProperty(i)) {
                data.options[i] = options[i];
              }
            }
          }

          if (typeof _option == 'string') {
            if (data[_option] instanceof Function) {
              value = data[_option].apply(data, args);
            } else {
              value = data.options[_option];
            }
          }
        }
      });

      if (typeof value !== 'undefined') {
        // noinspection JSUnusedAssignment
        return value;
      } else {
        return chain;
      }
    }

    var old = $.fn.selectpicker;
    $.fn.selectpicker = Plugin;
    $.fn.selectpicker.Constructor = Selectpicker;

    // SELECTPICKER NO CONFLICT
    // ========================
    $.fn.selectpicker.noConflict = function() {
      $.fn.selectpicker = old;
      return this;
    };

    $(document)
      .off('keydown.bs.dropdown.data-api', '.bootstrap-select [data-toggle="dropdown"], .bootstrap-select .dropdown-menu')
      .on('keydown' + EVENT_KEY, '.bootstrap-select [data-toggle="dropdown"], .bootstrap-select [role="listbox"], .bootstrap-select .bs-searchbox input', Selectpicker.prototype.keydown)
      .on('focusin.modal', '.bootstrap-select [data-toggle="dropdown"], .bootstrap-select [role="listbox"], .bootstrap-select .bs-searchbox input', function(e) {
        e.stopPropagation();
      });

    // SELECTPICKER DATA-API
    // =====================
    $(window).on('load' + EVENT_KEY + '.data-api', function() {
      $('.selectpicker').each(function() {
        var $selectpicker = $(this);
        Plugin.call($selectpicker, $selectpicker.data());
      })
    });
  })(jQuery);


}));